SOLUTION: 4+9xy-18y-2x OK, I'm supposed to factor this by grouping, but i'm not sure how to do that.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 4+9xy-18y-2x OK, I'm supposed to factor this by grouping, but i'm not sure how to do that.      Log On


   

Question 209285: 4+9xy-18y-2x
OK, I'm supposed to factor this by grouping, but i'm not sure how to do that.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
4 + 9xy - 18y - 2x
Easier to see if you group it like this:
9xy - 18y - 2x + 4
;
Factor out 9y and you have
9y(x - 2) - 2x + 4
:
factor out -2
9y(x - 2) - 2(x - 2)
:
Factor out (x - 2) leaving:
(x - 2) (9y - 2)
:
Did this make sense to you?