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

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

you good from there?

anonymous · Answer

get rid of any common factors you see top and bottom

anonymous · Answer

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

anonymous · Answer

Thank you @satellite73 that helped alot

anonymous · Answer

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