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anonymous

  • 4 years ago

Solve. 2x^2 + x = 15.

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  1. anonymous
    • 4 years ago
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    use -b formula, where a=2 b=1 and c=-15,

  2. radar
    • 4 years ago
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    Factor (x+3)(2x-5)=0

  3. anonymous
    • 4 years ago
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    2x^2 + x - 15 = 0 2x^2 +3x - 5x - 15 = 0 2x(x +3 ) - 5(x + 3) = 0 (2x - 5 )(x + 3) = 0

  4. anonymous
    • 4 years ago
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    x = 5/2 . -3

  5. anonymous
    • 4 years ago
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    x = 5/2 and x = -3

  6. anonymous
    • 4 years ago
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    |dw:1327959556390:dw|

  7. anonymous
    • 4 years ago
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    typo in second line of my solution should be 2x^2 +6x - 5x - 15 = 0

  8. anonymous
    • 4 years ago
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    |dw:1327959697968:dw|