Pre-Algebra Examples

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

Step 1

Remove parentheses.

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

Step 2

Add $k^{2}$ and $k^{2}$ .

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

Step 3

Add $- 4 k$ and $9 k$ .

$2 k^{2} + 5 k + 7 - 3$

Step 4

Subtract $3$ from $7$ .

$2 k^{2} + 5 k + 4$

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