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Math Help - Factoring x^3 + 6x = 6x^2 + 8?

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    Factoring x^3 + 6x = 6x^2 + 8?

    Factoring x^3 + 6x = 6x^2 + 8?

    hello. i can't seem to figure out how to factor this equation without a calculator . help would be greatly appreciated

    x^3 + 6x = 6x^2 + 8
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  2. #2
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    that's because it's not factorable ... you'll need to use technology or
    The "Cubic Formula" to solve it.
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    Quote Originally Posted by guitarplaya08 View Post
    Factoring x^3 + 6x = 6x^2 + 8?

    hello. i can't seem to figure out how to factor this equation without a calculator . help would be greatly appreciated

    x^3 + 6x = 6x^2 - 8
    Bring all the terms on one side,

    x^3-6x^2+6x+8=0

    If we substitute x=4 in this equation, its value =0.

    so, (x-4) is one factor. Now divide the expression by (x-4)

    we got x^2-2x-2

    So, the expression is (x-4)(x^2-2x-2)=0
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    Quote Originally Posted by guitarplaya08 View Post
    Factoring x^3 + 6x = 6x^2 + 8?

    hello. i can't seem to figure out how to factor this equation without a calculator . help would be greatly appreciated

    x^3 + 6x = 6x^2 + 8
    Quote Originally Posted by skeeter View Post
    that's because it's not factorable ... you'll need to use technology or
    The "Cubic Formula" to solve it.
    Quote Originally Posted by Shyam View Post
    Quote Originally Posted by guitarplaya08 View Post
    Factoring x^3 + 6x = 6x^2 + 8?

    hello. i can't seem to figure out how to factor this equation without a calculator . help would be greatly appreciated

    x^3 + 6x = 6x^2 - 8
    Bring all the terms on one side,

    x^3-6x^2+6x+8=0

    If we substitute x=4 in this equation, its value =0.

    so, (x-4) is one factor. Now divide the expression by (x-4)

    we got x^2-2x-2

    So, the expression is (x-4)(x^2-2x-2)=0
    It looks like something screwy is going on .......

    Word to the wise, skeeter ...... Quote the OP when replying .....
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