Question

Multiply.
x^2 + 8x +15/x - 4 times x^2 -16/2x +6
A.x^4+8x-1/3x + 2
B.(x + 5)(x +4)/2
C.(x - 5) (x+4)/ 2
D.x^4+8x^3-x/ 2x^3 - 24

Answer 1

\[\frac{x^2+8x+15}{x-4}\times \frac{x^2-16}{2x+6}\]
\[\large=\frac{(x+5)(x+3)((x+4)(x-4)}{2(x-4)(x+3)}\] is a start

Answer 2

it says "multiply" but it should actually say "factor and cancel"

Answer 3

you good from there?

Answer 4

get rid of any common factors you see top and bottom

Answer 5

i did not explain how to factor
you just kind of have to know that

Answer 6

Thank you @satellite73 that helped alot

Answer 7

i.e. you have to know that \(x^2-16=(x+4)(x-4)\) for example

yw