math
posted by
Sophie
.
Simplify: (12i)+(46i)
I get 38i and 58i... confused, which one is it?

math 
Reiny
I get 38i
how did you get 5  8i ??
1 + 4 = 3 not 5

math 
MathMate
38i is correct.
(12i)+(46i)
= 12i + 46i
= 1+4 2i 6i
= 3  8i

math 
Sophie
I get confused with negatives sometimes! thanks though!!