Simplify (x - 4)(x2 - 2x - 3)
I know it factors out to (x-4)(x-3)(x+1) but I don't know how to multiply from there my answer choices are:
x^3 - 6x^2 + 5x + 12
x^3 + 6x^2 - 11x + 12
x^3 + 6x^2 - 11x - 12
x^3 - 6x^2 + 5x - 12
Please help (:

Question

Simplify (x - 4)(x2 - 2x - 3)
I know it factors out to (x-4)(x-3)(x+1) but I don't know how to multiply from there my answer choices are:
x^3 - 6x^2 + 5x + 12
x^3 + 6x^2 - 11x + 12
x^3 + 6x^2 - 11x - 12
x^3 - 6x^2 + 5x - 12
Please help (:

parthkohli · Answer

Multiplication is the easiest method.$$(x-4)(x^2 - 2x - 3) $$$$= x (x^ 2 - 2x - 3) - 4(x^2 - 2x - 3)$$

anonymous · Answer

so x^3 -2x^2 -3x -4x^2 +8x +12 
add like terms and I get 
x^3 - 6x^2 + 5x +12?

parthkohli · Answer

You got it fast!

anonymous · Answer

Thank you! (: