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26 June, 19:58

Solve 2x2 + 3x - 7 = x2 + 5x + 39 for x.

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  1. 26 June, 20:16
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    2x² + 3x - 7 = x² + 5x + 39

    *Subtract x² + 5x + 39 from both sides*

    x² - 2x - 46 = 0

    Then, use the quadratic formula with a=1, b=-2, c=-46.

    x = 1 + / - √ 47. (Written 1 plus or minus the square root of 47)
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