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Math Help - Factorising

  1. #1
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    Factorising

    How to solve the following problem by factorising?

    2X+5=11X

    This is in the same section as the following one so I need to be able to solve it the same way:

    2X^2+5X=3
    2X^2+5X-3=0
    2X^2+6X-X-3=0
    2X(X+3)-1(X+3)=0
    (X+3)(2X-1)=0
    X=-3 or 1/2
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  2. #2
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    Quote Originally Posted by juliak View Post
    How to solve the following problem by factorising?

    2X+5=11X

    This is in the same section as the following one so I need to be able to solve it the same way:

    2X^2+5X=3
    2X^2+5X-3=0
    2X^2+6X-X-3=0
    2X(X+3)-1(X+3)=0
    (X+3)(2X-1)=0
    X=-3 or 1/2
    The problem involves a linear equation. There is no common factor. It does not factorise. Solve it as you would any linear equation.
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  3. #3
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    in case you didn't understand the previous answer
    your equation has no square
    so you can just subtract 2x from both sides ->
    5 =9x
    then divide both sides by 9
    x = 5/9
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