Question 182634
please help me solve this.
I don't know how to start. 
(3+10i)^2 
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There's nothing to solve for.  This can be expanded, tho
(3+10i)^2 = (3+10i)*(3+10i)
= 3*(3+10i) + 10i*(3+10i)
= 9+30i + 30i -100
= -91 + 60i Bigger numbers, but it is simpler.