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jose1970

  • 4 years ago

2x^2+2x-6=0

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  1. AnimalAin
    • 4 years ago
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    Remove the common factor first; after that, it will be easy to factor.

  2. benice
    • 4 years ago
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    you might have to use the - b formula

  3. jose1970
    • 4 years ago
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    im sorry, its completing the square

  4. AnimalAin
    • 4 years ago
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    Completing the square: \[2x^2+2x-6=0\]\[x^2+x=3\]\[x^2+x+1/4=3+1/4\]\[(x+1/2)^2=13/4\]\[x+1/2=\pm \sqrt{13}/2\]\[x=-1/2 \pm \sqrt{13}/2\]

  5. AnimalAin
    • 4 years ago
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    I guess it wouldn't have factored that well.....

  6. jose1970
    • 4 years ago
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    thanks, i have another one if you don't mind 3x^2+6x-5=0

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