Pre-Algebra Examples

$(4 x^{2} - 2 x + 7) + (3 x - 7 x^{2} - 9)$

Step 1

Remove parentheses.

$4 x^{2} - 2 x + 7 + 3 x - 7 x^{2} - 9$

Step 2

Subtract $7 x^{2}$ from $4 x^{2}$ .

$- 3 x^{2} - 2 x + 7 + 3 x - 9$

Step 3

Add $- 2 x$ and $3 x$ .

$- 3 x^{2} + x + 7 - 9$

Step 4

Subtract $9$ from $7$ .

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

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