Question

which expression is equivalent to (9i + 3) - (-4i - 1)? 5i + 4 13i + 4 -5i - 2 -13i - 2

Explanation:

Step1: Remove parentheses

$(9i + 3)-(-4i - 1)=9i + 3 + 4i+1$

Step2: Combine like - terms

$(9i+4i)+(3 + 1)=13i + 4$

Answer:

$13i + 4$