Question

What is the simplified expression for

3a2+9ab+5-4a2-4ab+3?

a) -a2+5ab+8

b) -a2-13ab+5+3

c) a2+5ab+8

d) a2-13ab+5+3

Answer 1

Answer:

a) - a² + 5ab + 8

Step-by-step explanation:

$3a^2+9ab+5-4a^2-4ab+3\qquad\text{combine like terms}\\\\=(3a^2-4a^2)+(9ab-4ab)+(5+3)\\\\=-a^2+5ab+8$