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Math Help - How do i solve this easy equation?

  1. #1
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    Question How do i solve this easy equation?

    Hello :-)

    I have no idea why this is going wrong:

    0 = -3^2 - 4*2*x
    3^2 = -4*2*x
    9 = -4*2*x
    9 / (-4*2) = x

    x = -1.125

    it should be 1.125 :S not negative

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  2. #2
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    Re: How do i solve this easy equation?

    You got it right.
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  3. #3
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    Re: How do i solve this easy equation?

    no i didn't... try to put -1.125 at the x position, and its wrong
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  4. #4
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    Re: How do i solve this easy equation?

    I think the issue is that it is (-3)^2. This makes 9. So instead of adding 3^2 to both sides in your first algebraic step, you should subtract 9. This will alleviate the negative issue.

    Hope this helps!
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  5. #5
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    Re: How do i solve this easy equation?

    Maybe, but it says -3^2 and that is -9.

    Do we have to guess what people are asking?
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  6. #6
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    Re: How do i solve this easy equation?

    Quote Originally Posted by mathmansam View Post
    I think the issue is that it is (-3)^2. This makes 9. So instead of adding 3^2 to both sides in your first algebraic step, you should subtract 9. This will alleviate the negative issue.

    Hope this helps!
    thank you, i got it
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