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11 July, 18:18

Solve seven x square 2 plus twenty x negative three equals? 7x2+20x-3=

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Answers (1)
  1. 11 July, 18:36
    0
    7x² + 20x - 3 = 0

    x = - (20) + / - √ ((20) ² - 4 (7) (-3))

    2 (7)

    x = - 20 + / - √ (400 + 84)

    14

    x = - 20 + / - √ (484)

    14

    x = - 20 + / - 22

    14

    x = - 20 + 22 x = - 20 - 22

    14 14

    x = 2 x = - 42

    14 14

    x = ¹/₇ x = - 3
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