Question

Given the trinomial, what is the value of the coefficient 'B' in the factored form?

2x^2 - 12xy - 32y^2 = 2(x - 8y)(x + By)

B= ____________

Answer 1

can u help me

Answer 2

first you need to put the polynomial on the right side in standard form
(this means you will first need to distribute on the right hand side)

Answer 3

you need to do this because the left side is in standard form

Answer 4

so both sides need to be in the same form to find what B is

Answer 5

there is a shortcut but i don't think we should do that until you have more experience with multiplying polynomials

Answer 6

i dont remember how to distribute

Answer 7

first let's look at multiplying (x-8y)(x+by)
then we will come back in multiply all terms we get from that by 2
since we did have 2*(x-8y)(x+by)


so anyways back to (x-8y)(x+by)

you can do this by what the americans call foil method
it seems to be all the rage in america

:p


have you ever heard of that method?