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<b>let </b><font color="Maroon">z1</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K2">COMPLEX</a> ;<br/><b>let </b><font color="Maroon">z2</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K2">COMPLEX</a> ;<br/>



<a NAME="E1:61"/><i><font color="Green">E21</font></i>: 
(  <a href="complex1.html#K3" target="_self">Re</a> <span class="p1">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span> <a href="hidden.html#R1">=</a>  <a href="complex1.html#K3" target="_self">Re</a> <font color="Maroon">z1</font> &amp;  <a href="complex1.html#K3" target="_self">Re</a> <span class="p1">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span> <a href="hidden.html#R1">=</a>  <a href="complex1.html#K3" target="_self">Re</a> <font color="Maroon">z2</font> )
 
<b>by </b><i><a class="txt" href="complex1.html#E23"><i><font color="Green">Lemma48</font></i></a></i>;<br/>
<a NAME="E2:61"/><i><font color="Green">E22</font></i>: 
(  <a href="complex1.html#K4" target="_self">Im</a> <span class="p1">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span> <a href="hidden.html#R1">=</a>  <a href="real_1.html#K1">-</a> <span class="p1">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <font color="Maroon">z1</font></span>)</span> &amp;  <a href="complex1.html#K4" target="_self">Im</a> <span class="p1">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span> <a href="hidden.html#R1">=</a>  <a href="real_1.html#K1">-</a> <span class="p1">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <font color="Maroon">z2</font></span>)</span> )
 
<b>by </b><i><a class="txt" href="complex1.html#E23"><i><font color="Green">Lemma48</font></i></a></i>;<br/>
<b>thus </b> <a href="complex1.html#K3" target="_self">Re</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K9" target="_self">*</a> <font color="Maroon">z2</font></span>)</span> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span> = 
 <a href="complex1.html#K3" target="_self">Re</a> <span class="p1">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K9" target="_self">*</a> <font color="Maroon">z2</font></span>)</span>
<b>by </b><i><a class="txt" href="complex1.html#E23"><i><font color="Green">Lemma48</font></i></a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="complex1.html#K3" target="_self">Re</a> <span class="p3">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span> <a href="real_1.html#K4">*</a> <span class="p2">(<span class="default"><a href="complex1.html#K3" target="_self">Re</a> <span class="p3">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span> <a href="real_1.html#K5">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p3">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p4">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span> <a href="real_1.html#K4">*</a> <span class="p2">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p3">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p4">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i>, <a class="ref" href="complex1.html#T15" target="_self">Th15</a>, <a class="txt" href="complex1.html#E11"><i><font color="Green">Lemma32</font></i></a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="complex1.html#K3" target="_self">Re</a> <span class="p3">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span> <a href="real_1.html#K4">*</a> <span class="p2">(<span class="default"><a href="complex1.html#K3" target="_self">Re</a> <span class="p3">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span> <a href="real_1.html#K5">-</a> <span class="p1">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p2">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p5">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span> <a href="real_1.html#K4">*</a> <span class="p4">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p5">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>

<br/>.= 
 <a href="complex1.html#K3" target="_self">Re</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span> <a href="complex1.html#K9" target="_self">*</a> <span class="p2">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="complex1.html#E11"><i><font color="Green">Lemma32</font></i></a></i>
; <i><font color="Red">:: according to </font></i><a class="ref" href="complex1.html#D5" target="_self">COMPLEX1:def 5</a><br/>

<b>thus </b> <a href="complex1.html#K4" target="_self">Im</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K9" target="_self">*</a> <font color="Maroon">z2</font></span>)</span> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span> = 
 <a href="real_1.html#K1">-</a> <span class="p1">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p2">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K9" target="_self">*</a> <font color="Maroon">z2</font></span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="complex1.html#E23"><i><font color="Green">Lemma48</font></i></a></i>
<br/>.= 
 <a href="real_1.html#K1">-</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="complex1.html#K3" target="_self">Re</a> <span class="p4">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span> <a href="real_1.html#K4">*</a> <span class="p3">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p4">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p5">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span></span>)</span> <a href="real_1.html#K3">+</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><a href="complex1.html#K3" target="_self">Re</a> <span class="p4">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span> <a href="real_1.html#K4">*</a> <span class="p3">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p4">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p5">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>
<b>by </b><i>, <a class="ref" href="complex1.html#T15" target="_self">Th15</a>, <a class="txt" href="complex1.html#E11"><i><font color="Green">Lemma32</font></i></a></i>
<br/>.= 
<span class="p1">(<span class="default"><span class="p2">(<span class="default"><a href="complex1.html#K3" target="_self">Re</a> <span class="p3">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span> <a href="real_1.html#K4">*</a> <span class="p2">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p3">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span> <a href="real_1.html#K3">+</a> <span class="p1">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p2">(<span class="default"><a href="real_1.html#K1">-</a> <span class="p3">(<span class="default"><span class="p4">(<span class="default"><a href="complex1.html#K3" target="_self">Re</a> <span class="p5">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span> <a href="real_1.html#K4">*</a> <span class="p4">(<span class="default"><a href="complex1.html#K4" target="_self">Im</a> <span class="p5">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span></span>)</span></span>)</span></span>)</span>

<br/>.= 
 <a href="complex1.html#K4" target="_self">Im</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">z1</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span> <a href="complex1.html#K9" target="_self">*</a> <span class="p2">(<span class="default"><font color="Maroon">z2</font> <a href="complex1.html#K15" target="_self">*'</a> </span>)</span></span>)</span>
<b>by </b><i><a class="txt" href="complex1.html#E11"><i><font color="Green">Lemma32</font></i></a></i>
;<br/>


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