27 August, 02:35
What is (5+2i) * (5+2i) ?
27 August, 03:35
27 August, 03:57
(5+2i) * (5+2i)
25 + 10 i + 10 i + 4i^2
Remember ... when there is a number with i^2 it will equal to (-1) ...
So that means in this question ... I replace 4i^2 with - 4 because 4 (-1) = - 4
Now I can combine like terms ...
25 + 10i + 10i - 4
Soo ... The answer is 21 + 20i
Know the Answer?
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