Simplify (-6i)(-4i)

$(- 6 i) (- 4 i)$

Step 1

Multiply $(- 6 i) (- 4 i)$ .

Multiply $- 4$ by $- 6$ .

$24 i i$

Raise $i$ to the power of $1$ .

$24 (i^{1} i)$

Raise $i$ to the power of $1$ .

$24 (i^{1} i^{1})$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$24 i^{1 + 1}$

Add $1$ and $1$ .

$24 i^{2}$

Step 2

Rewrite $i^{2}$ as $- 1$ .

$24 \cdot - 1$

Step 3

Multiply $24$ by $- 1$ .

$- 24$