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26 January, 03:32

Solve for x: 2xsquared+4x-16=0

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Answers (1)
  1. 26 January, 05:02
    0
    2x² + 4x - 16 = 0

    2 (x²) + 2 (2x) - 2 (8) = 0

    2 (x² + 2x - 8) = 0

    2 2

    x² + 2x - 8 = 0

    x = - (2) ± √ ((2) ² - 4 (1) (-8))

    2 (1)

    x = - 2 ± √ (4 + 32)

    2

    x = - 2 ± √ (36)

    2

    x = - 2 ± 6

    2

    x = - 1 ± 3

    x = - 1 + 3 U x = - 1 - 3

    x = 2 x = - 4
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