Answer:
2x^3+9x^2+9x
Step-by-step explanation:
Multiply the paranthesis.
Collect like terms:
2x^3+6x^2+3x^2+9x
4x^2−9
(2x+3)(2x−3)
This is a case of a law
(a−b)(a+b)=a2−b2
Here,
2x=a
3=b
Apply
(2x)^2−3^2
