Question

i) simplify.
$(-10 + 10i) + (4 - 5i)$
ii) write your answer in the form $a + bi$.

Explanation:

Step1: Group real and imaginary parts

$(-10 + 4) + (10i - 5i)$

Step2: Calculate real and imaginary sums

$\frac{}{}-6 + 5i$

Answer:

$-6 + 5i$