Question

I bet noone can get this!simplify 2+3i
_______
2-5i
A.)-11+16
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-21
B.)-11+16i
--------
29
C.)19+16
---------
-21
D.) 1 -3/5i

Answer 1

it's a, you have to multiply the eq by 1, based on the complex conjugate of the the denominator (2+5i) . 1 = (2+5i)/(2+5i). so you have an i^2 in the denominator, it technically looks like it should turn out 11-16i/21, but you do get the two negatives after computing it