Question

9x3 + 18x2 – x – 2

Answer 1

\[9x^3+18x^2-x-2\]

Answer 2

hint:
9x^3 + 18x^2 - x - 2 = 9x^2(x+2)-1(x-2)
= (3x)^2(x+2)-(x+2)

Also note: (a^2 - b^2) = (a-b)(a+b)

Answer 3

Let me know if you can get it from here.