Which binomial is a factor of -2x^3+14x^2-24x+20
a.x-24 c.x+20
b.x-5 d.x+5

Question

Which binomial is a factor of -2x^3+14x^2-24x+20 
a.x-24                                   c.x+20
b.x-5                                     d.x+5

anonymous · Answer

b

anonymous · Answer

Can u explain to me what u did

anonymous · Answer

sorry about the delay. updates

anonymous · Answer

ok what you need to do first is factor out a -2 from the initial equation

anonymous · Answer

then look at the equation and instead of the 20 you have a -10.

anonymous · Answer

so you have to find 2 numbers to multiply together to get-10

anonymous · Answer

these numbers are $$\pm$$ (1, 2, 5, 10)

anonymous · Answer

then comes the busy work. you have to substitute each positive and negative number into the equation so see if if equals 0. In this case, we get -5 and +2 to work

anonymous · Answer

the factorization of the cubic polynomial always turns out to be:
(where y is any number)
(x[\pm\]y)(x[^{2}\][\pm\]yx[\pm\]y)

anonymous · Answer

(x+y)(x^y+x+y)

anonymous · Answer

this should help: http://www.youtube.com/watch?v=W6uBnW_vwyk&feature=related

anonymous · Answer

ok thankss bro.