SOLUTION: Having issues solving this one: (x-5)�-6(x-5)+8. I came up with the answer (x-11)(x+3) but that's not the right answer...please help. Used the u�+bu+c formula and Im missing so

Question 285425: Having issues solving this one: (x-5)�-6(x-5)+8. I came up with the answer (x-11)(x+3) but that's not the right answer...please help. Used the u�+bu+c formula and Im missing something here.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!

let's say u= (x-5)
u^2-6u+8
factors are -4 and -2
(u-4)*(u-2)
now substitute x-5 for u
(x-5-4)*(x-5-2)
(x-9)*(x-7)
Which works.
I can't for the life of me think how you got (x-11) and (x+3).
if you had calculated out the original expression you should have gotten
x^2-16x+63
which also factors to (x-9)(x-7)

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