Evaluate -i*i

$- i \cdot i$

Step 1

Multiply $- i i$ .

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

$- (i^{1} i)$

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

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

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

$- i^{1 + 1}$

Add $1$ and $1$ .

$- i^{2}$

Step 2

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

$- - 1$

Step 3

Multiply $- 1$ by $- 1$ .

$1$