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    2x x 2y =

    0  Views: 452 Answers: 1 Posted: 10 years ago

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    http://www.purplemath.com/modules/simpfact2.htm



    • Factor x2y3 + xy


    I can factor an "x" and a "y" out of each term: x2yxy(x1y2) = xy(xy2) and xyxy(1).


       x2y3 + xy = xy(           )


       = xy(xy2        )


       = xy(xy2 + 1)


    Remember: When "nothing" is left after factoring, a "1" is left behind in the parentheses.



    • Factor 3x3 + 6x2 – 15x.


    I can factor a "3" and an "x" out of each term: 3x3 = 3x(x2), 6x2 = 3x(2x), and 
    –15x = 3x(–5). Being careful of my signs, I get:


    3x3 + 6x2 – 15x = 3x(                    )


    = 3x(x2               )


    = 3x(x2 + 2x      )


    3x(x2 + 2x – 5)



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