Question

Factor x3 – 2x2 – 16x + 32 = 0, given that 2 is a zero.



(x – 2)(x2 – 16) = 0


(x – 2)(x – 4)(x + 4) = 0


(x + 2)(x – 4)(x + 4) = 0

Answer 1

I"M SO CONFUSED!!!!

Answer 2

uh... i'm not sure. I'm completely brain dead right now.

Answer 3

Oh okay. and then?

Answer 4

okay so think about this question
x*y=0
this is true when either x is 0 or y is 0 as anything times 0 = 0

Answer 5

yeah I know that but how do I factor this?

Answer 6

okay u know that 2 is a zero.. what does that mean?

Answer 7

factoring?

Answer 8

okay that means that if u split this upto into 2 brackets when x=2 then one of the brackets goes to 0

Answer 9

(x-2) (......) =0
^--------- so u know this bracket has to exist

Answer 10

when u put in 2 for x that bracket goes to zero so this equation will be true because no matter what u put in the other bracket... the product of these 2 brackets will be 0 when x=2

Answer 11

OH okay.

Answer 12

do u really understand

Answer 13

It came back to me. I remember now.

Answer 14

okay good