Question

Help please!? this one is so confusing!



Simplify (x + 2)(x2– 4x – 9)

x3– 2x2– 17x – 18

x3– 6x2– x – 18

x3– 4x2– 3x – 18

x3– 10x2– 9x – 18
THANK YOU! ::)

Answer 1

also this one. What does it mean factor completely? but I'm guessing its D?
Factor completely 3x3– 21x2– 27x

3x(x2– 7x – 9)

3x(x + 1)(x – 9)

3(x2– 7x – 9)

3(x3– 21x2– 27x)

Answer 2

answer is x3– 2x2– 17x – 18

Answer 3

wait no...C for the seccond Q

Answer 4

(x + 2)(x2– 4x – 9) = x^3 -4x^2 - 9x+2x^2 - 8x -18= x^3 -2x^2 -17x -18...so option A

Answer 5

For secnd Q it is option A...pretty dure

Answer 6

3x3– 21x2– 27x = 3x( x^2 -7x - 9)...taking 3x common...