SOLUTION: Factor by grouping x^2-y^2-ax-ay

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Question 276444: Factor by grouping x^2-y^2-ax-ay
Answer by mananth(16946) About Me  (Show Source):
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x^2-y^2-ax-ay
(x+y)(x-y) - a(x+y)
(x+y){ x-y -ax+ay)
(x+y){ x-ax-y+ay}
(x+y){x(1-a)-y(1-a)}
(x+y){(1-a)(x-y)}
(x+y)(x-y)(1+a)