Short Answer. Find the following product:(y^2-5y-2)(y+8)

Question

anonymous · Answer

try and use FOIL

directrix · Answer

(y^2-5y-2)(y+8) = (y+8) (y^2 - 5y -2)

Take the y term and multiply it by each term in the trinomial (y^2 - 5y -2) and ..

directrix · Answer

@mth3v4 --> FOIL is for the product of binomials which is not the case here.

anonymous · Answer

factor the trinomial before you do anything

directrix · Answer

y(y^2) + y (-5y) + y (-2) =y^3 - 5y^2 -2y. That will be added to the next set of multiplications so..

directrix · Answer

Multiply 8 times each term of the trinomial (y^2 -5y -2) to get ...

anonymous · Answer

how would the steps looking

directrix · Answer

8(y^2) + 8 ( -5y) + 8(-2) = 8y^2 -40y -16.

anonymous · Answer

ok would the other things you wrote be in the steps

directrix · Answer

y^3 - 5y^2 -2y + 8y^2 -40y -16 = y^3 + 3y^2 -42y - 16. (check it, please)

If this is not the method you like, then how do you do these in class?

anonymous · Answer

this is my first time doing it in class so i don't really know of anyother way

directrix · Answer

directrix · Answer

Questions? What I did was to take each term of the binomial (y + 8) and multiply it by each term of the trinomial (y^2 - 5y -2).

anonymous · Answer

ok

directrix · Answer

I can do it another way if this method doesn't make sense.

anonymous · Answer

no that method helped me

directrix · Answer

Okay. Thanks.