Pre-Algebra Examples

Find the sum of $- 7 x^{2} - 6 x + 9$ and $- 3 x^{2} - x + 7$

Step 1

Write the problem as a mathematical expression.

$- 7 x^{2} - 6 x + 9 - 3 x^{2} - x + 7$

Step 2

Subtract $3 x^{2}$ from $- 7 x^{2}$ .

$- 10 x^{2} - 6 x + 9 - x + 7$

Step 3

Subtract $x$ from $- 6 x$ .

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

Step 4

Add $9$ and $7$ .

$- 10 x^{2} - 7 x + 16$