Question
Find the real number x if (x-2i)(1+i)is purely imaginary.
Answers
oobleck
(x-2i)(1+i) = x+2 + some i stuff
If it's purely imaginary, the real part, x+2 = 0
If it's purely imaginary, the real part, x+2 = 0
Gash
M nt understanding whether it's purely imaginary or no