Question

How do you simplify `(4 – 10i) – (5 – 7i)`?

Answer 1

-1 - 3i

Explanation:

To add/subtract complex numbers , add the real terms together and the imaginary terms together.

If (a + bi ) and (c + di ) are 2 complex numbers.

then a + bi + c + di = (a + c ) + (b + d )i

here 4 - 10i -5 + 7i = (4 - 5 ) +(-10+7)i = -1 - 3i