Simplify -9a^2-17a^2-8a-8-12a^2-17-9a+7a

$- 9 a^{2} - 17 a^{2} - 8 a - 8 - 12 a^{2} - 17 - 9 a + 7 a$

Step 1

Subtract $17 a^{2}$ from $- 9 a^{2}$ .

$- 26 a^{2} - 8 a - 8 - 12 a^{2} - 17 - 9 a + 7 a$

Step 2

Subtract $12 a^{2}$ from $- 26 a^{2}$ .

$- 38 a^{2} - 8 a - 8 - 17 - 9 a + 7 a$

Step 3

Subtract $9 a$ from $- 8 a$ .

$- 38 a^{2} - 17 a - 8 - 17 + 7 a$

Step 4

Add $- 17 a$ and $7 a$ .

$- 38 a^{2} - 10 a - 8 - 17$

Step 5

Subtract $17$ from $- 8$ .

$- 38 a^{2} - 10 a - 25$