Question

simplify the expression (-4 - 9i) + (5 - 7i)

Explanation:

Step1: Group real and imaginary parts

$(-4 + 5) + (-9i -7i)$

Step2: Calculate real part sum

$-4 + 5 = 1$

Step3: Calculate imaginary part sum

$-9i -7i = -16i$

Step4: Combine results

$1 + (-16i)$

Answer:

$1 - 16i$