Pre-Algebra Examples

$(- 10 x^{2} + 9) + (8 x^{2} - 5 x + 7)$

Step 1

Remove parentheses.

$- 10 x^{2} + 9 + 8 x^{2} - 5 x + 7$

Step 2

Add $- 10 x^{2}$ and $8 x^{2}$ .

$- 2 x^{2} + 9 - 5 x + 7$

Step 3

Add $9$ and $7$ .

$- 2 x^{2} - 5 x + 16$

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