Precalculus Examples

$- 9 x^{2} + 15 x - 4 (2 x + 2)$

Step 1

Simplify each term.

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Step 1.1

Apply the distributive property.

$- 9 x^{2} + 15 x - 4 (2 x) - 4 \cdot 2$

Step 1.2

Multiply $2$ by $- 4$ .

$- 9 x^{2} + 15 x - 8 x - 4 \cdot 2$

Step 1.3

Multiply $- 4$ by $2$ .

$- 9 x^{2} + 15 x - 8 x - 8$

$- 9 x^{2} + 15 x - 8 x - 8$

Step 2

Subtract $8 x$ from $15 x$ .

$- 9 x^{2} + 7 x - 8$

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