Precalculus Examples

$- 4 i^{2} + 2 i$

Step 1

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

$- 4 \cdot - 1 + 2 i$

Step 2

Multiply $- 4$ by $- 1$ .

$4 + 2 i$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$