Question

simplify.
$-9i + 8i - 8i$
write your answer in the form $a + bi$.

Explanation:

Step1: Combine like terms (i terms)

$-9i + 8i - 8i = (-9 + 8 - 8)i$

Step2: Calculate the coefficient

$(-9 + 8 - 8)i = (-9)i$

Step3: Rewrite in $a+bi$ form

$0 + (-9)i$

Answer:

$0 - 9i$