Pre-Algebra Examples

$(7 x^{2} - 1) + (2 x^{2} + 7)$

Step 1

Remove parentheses.

$7 x^{2} - 1 + 2 x^{2} + 7$

Step 2

Add $7 x^{2}$ and $2 x^{2}$ .

$9 x^{2} - 1 + 7$

Step 3

Add $- 1$ and $7$ .

$9 x^{2} + 6$

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