Question

i) simplify.
$-13i - 2i + 7i$
ii) write your answer in the form $a + bi$.

Explanation:

Step1: Combine like terms (i terms)

$(-13 - 2 + 7)i$

Step2: Calculate the coefficient

$(-15 + 7)i = -8i$

Step3: Rewrite in $a+bi$ form

$0 + (-8)i$

Answer:

$0 - 8i$