Trigonometry Examples

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

Step 1

Apply the distributive property.

$x^{2} - 9 x^{2} - 9 \cdot 9$

Step 2

Multiply $- 9$ by $9$ .

$x^{2} - 9 x^{2} - 81$

Step 3

Subtract $9 x^{2}$ from $x^{2}$ .

$- 8 x^{2} - 81$

Step 4

Factor $- 1$ out of $- 8 x^{2} - 81$ .

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Step 4.1

Factor $- 1$ out of $- 8 x^{2}$ .

$- (8 x^{2}) - 81$

Step 4.2

Rewrite $- 81$ as $- 1 (81)$ .

$- (8 x^{2}) - 1 (81)$

Step 4.3

Factor $- 1$ out of $- (8 x^{2}) - 1 (81)$ .

$- (8 x^{2} + 81)$

$- (8 x^{2} + 81)$

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