Simplify 9b^2-10b-5b+4+7b^2-6-15b^2-9b

$9 b^{2} - 10 b - 5 b + 4 + 7 b^{2} - 6 - 15 b^{2} - 9 b$

Step 1

Add $9 b^{2}$ and $7 b^{2}$ .

$16 b^{2} - 10 b - 5 b + 4 - 6 - 15 b^{2} - 9 b$

Step 2

Subtract $15 b^{2}$ from $16 b^{2}$ .

$b^{2} - 10 b - 5 b + 4 - 6 - 9 b$

Step 3

Subtract $5 b$ from $- 10 b$ .

$b^{2} - 15 b + 4 - 6 - 9 b$

Step 4

Subtract $9 b$ from $- 15 b$ .

$b^{2} - 24 b + 4 - 6$

Step 5

Subtract $6$ from $4$ .

$b^{2} - 24 b - 2$