Algebra Examples

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

Step 1

Remove parentheses.

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

Step 2

Add $9 r^{2}$ and $3 r^{2}$ .

$12 r^{2} + 4 r - 7 - 3 r$

Step 3

Subtract $3 r$ from $4 r$ .

$12 r^{2} + r - 7$

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