simplify the expression to a + bi form: (9 - 5i) + (5 + 7i)

Explanation:

Step1: Combine real - parts

Combine the real parts 9 and 5: $9 + 5=14$.

Step2: Combine imaginary - parts

Combine the imaginary parts $-5i$ and $7i$: $-5i+7i = 2i$.

Step3: Write in a + bi form

The result is $14 + 2i$.

Answer:

$14 + 2i$