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Math Help - Easy quadratic

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    Easy quadratic

    My friend says -x^2-x+6 = (-x+2)(x+3) But I said its -x^2-x+6 = (x+2)(x-3) Which one of us is right?
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  2. #2
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    Quote Originally Posted by nerdzor View Post
    My friend says -x^2-x+6 = (-x+2)(x+3) But I said its -x^2-x+6 = (x+2)(x-3) Which one of us is right?
    Your friend is correct.

     - x^2  - x + 6 =  - (x^2  + x - 6) =  - (x + 3)(x - 2) or (x + 3)(2 - x) or (-x-3)(x - 2)
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
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    you could have expanded both to see which was correct. note that in your form you had two positive x's. this means that when we multiply them, they will yield a positive x^2, which is not what you want. one must be positive and the other negative...
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