SOLUTION: Factor using Greatest common binomial factor x(y +9) -11 (y+9)

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Question 74061This question is from textbook
: Factor using Greatest common binomial factor
x(y +9) -11 (y+9) This question is from textbook

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Notice we have a common term of (y+9). If we let w=(y+9) we can rewrite the equation as
xw+-11w
So we can subtract like terms. For instance if we let x=15 it would look like
15w-11w=4w However, we don't know x, so we have to leave it alone. There are x terms of w and -11 w's, so we get
%28x-11%29%28w%29
And if we replaced w with (y+9) we get
%28x-11%29%28y%2B9%29
Hope this makes sense.