Pre-Algebra Examples

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

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

Step 1

Remove parentheses.

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

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

Step 2

Add

k^{2}

$k^{2}$ and

k^{2}

$k^{2}$ .

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

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

Step 3

Add

- 4 k

$- 4 k$ and

9 k

$9 k$ .

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

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

Step 4

Subtract

3

$3$ from

7

$7$ .

2 k^{2} + 5 k + 4

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

⎡ ⎢ ⎣ \begin{matrix} x^{2} & \frac{1}{2} \sqrt{π} & \int x d x \end{matrix} ⎤ ⎥ ⎦

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