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

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) (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

So we can subtract like terms. For instance if we let x=15 it would look like
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

And if we replaced w with (y+9) we get

Hope this makes sense.