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Math Help - Factoring guidelines needed

  1. #1
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    Factoring guidelines needed

    Since the original problem must be equivalent to the book answer, if I develop both sides, the final products have to be equivalent expressions. Thatís the theory. As I havenít been able to go from the original problem to the book answer, I decided to solve both sides to see were is my problem, but I canít see what Iím doing wrong.
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  2. #2
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    Quote Originally Posted by Alienis Back View Post
    Since the original problem must be equivalent to the book answer, if I develop both sides, the final products have to be equivalent expressions. Thatís the theory. As I havenít been able to go from the original problem to the book answer, I decided to solve both sides to see were is my problem, but I canít see what Iím doing wrong.
    In all three questions the procedure is the same: The common factor of the summands is the sum in brackets:

    If you factor out a term you have to divide each summand by this term.

    5x(a-2b)-3y(a-2b) = (a-2b)\left(\frac{5x(a-2b)}{a-2b}-\frac{3y(a-2b)}{a-2b} \right)= (a-2b)(5x-3y)

    The other 2 problems could be dome similarily(?).
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