Statistics Examples

x^{2} - 9

$x^{2} - 9$

Step 1

Rewrite

9

$9$ as

3^{2}

$3^{2}$ .

x^{2} - 3^{2}

$x^{2} - 3^{2}$

Step 2

Since both terms are perfect squares, factor using the difference of squares formula,

a^{2} - b^{2} = (a + b) (a - b)

$a^{2} - b^{2} = (a + b) (a - b)$ where

a = x

$a = x$ and

b = 3

$b = 3$ .

(x + 3) (x - 3)

$(x + 3) (x - 3)$

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⎡ ⎢ ⎣ \begin{matrix} x^{2} & \frac{1}{2} \sqrt{π} & \int x d x \end{matrix} ⎤ ⎥ ⎦

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