Write in Standard Form -9i^3+i^2

$- 9 i^{3} + i^{2}$

Step 1

Simplify each term.

Factor out $i^{2}$ .

$- 9 (i^{2} \cdot i) + i^{2}$

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

$- 9 (- 1 \cdot i) + i^{2}$

Rewrite $- 1 i$ as $- i$ .

$- 9 (- i) + i^{2}$

Multiply $- 1$ by $- 9$ .

$9 i + i^{2}$

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

$9 i - 1$

$9 i - 1$

Step 2

Reorder $9 i$ and $- 1$ .

$- 1 + 9 i$

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