Simplify 3a^2+9ab+5-4a^2-4ab+3

$3 a^{2} + 9 a b + 5 - 4 a^{2} - 4 a b + 3$

Step 1

Subtract $4 a^{2}$ from $3 a^{2}$ .

$- a^{2} + 9 a b + 5 - 4 a b + 3$

Step 2

Subtract $4 a b$ from $9 a b$ .

$- a^{2} + 5 a b + 5 + 3$

Step 3

Add $5$ and $3$ .

$- a^{2} + 5 a b + 8$