Question 809382
<pre>

|a+bi| = &#8730;<span style="text-decoration: overline">a²+b²</span>

|10-2i| = &#8730;<span style="text-decoration: overline">(10)²+(-2)²</span> = &#8730;<span style="text-decoration: overline">100+4</span> = &#8730;<span style="text-decoration: overline">104</span> = &#8730;<span style="text-decoration: overline">4·26</span> = 4&#8730;<span style="text-decoration: overline">26</span>.

Edwin</pre>