Question

Simplify the expression. (–6i)(–4i) A. –24 B. 24i C. –24i D. 24

Answer 1

Answer:

A. -24

Step-by-step explanation:

$\text{We know:}\ i=\sqrt{-1}\to i^2=-1\\\\(-6i)(-4i)=(-6)(-4)i^2=(24)(-1)=-24$