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Math Help - simplify

  1. #1
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    simplify

    1. -15x^2/20x

    2. (3x)^2/4xy * 16y/36x

    3. x^2+3/x^2 + x-1/5
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  2. #2
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    1. -15x^2/20x = -3x/4 ( Just simplify terms )

    2. 3x^2/4xy multiply 16y/36x
    48yx^2 / 144yx^2 ( Multiply the two terms first )
    1 / 3 ( Then simplify )

    Base on the help provided hope you will be able to answer question 3
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  3. #3
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    Quote Originally Posted by tester85 View Post
    1. -15x^2/20x = -3x/4 ( Just simplify terms )

    2. 3x^2/4xy multiply 16y/36x
    48yx^2 / 144yx^2 ( Multiply the two terms first )
    1 / 3 ( Then simplify )

    Base on the help provided hope you will be able to answer question 3
    Wouldn't 1 be -3x^2/4x?
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  4. #4
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    Quote Originally Posted by william View Post
    Wouldn't 1 be -3x^2/4x?
    -\frac{3x^2}{4x}=-\frac{3x\cdot x}{4x}=-\frac{3x}{4} \cdot \frac{x}{x}=-\frac{3x}{4}\cdot 1=-\frac{3x}{4}
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  5. #5
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    Quote Originally Posted by tester85 View Post
    1. -15x^2/20x = -3x/4 ( Just simplify terms )

    2. 3x^2/4xy multiply 16y/36x
    48yx^2 / 144yx^2 ( Multiply the two terms first )
    1 / 3 ( Then simplify )

    Base on the help provided hope you will be able to answer question 3
    Are you suggesting, for #2, that 1/3 is the most simplified form and the xy^2 simply gets canceled out?
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  6. #6
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    Quote Originally Posted by william View Post
    Are you suggesting, for #2, that 1/3 is the most simplified form and the xy^2 simply gets canceled out?
    yes,

    =\frac{3x^2}{4xy}\times\frac{16y}{36x}

    =\frac{48x^2y}{144x^2y}

    =\frac{1}{3}.\frac{x^2y}{x^2y}

    =\frac{1}{3}

    got it??? Now finish #3 yourself.
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