Simplify (-5i)^2

${(- 5 i)}^{2}$

Step 1

Apply the product rule to $- 5 i$ .

${(- 5)}^{2} i^{2}$

Step 2

Raise $- 5$ to the power of $2$ .

$25 i^{2}$

Step 3

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

$25 \cdot - 1$

Step 4

Multiply $25$ by $- 1$ .

$- 25$

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