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3 August, 00:33

Which are the solutions of the quadra

x2 = 7x + 4

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  1. 3 August, 00:44
    0
    x1 = (7-√65) / 2

    x2 = (7+√65) / 2

    Step-by-step explanation:

    x^2=7x+4

    x^2-7x-4=0

    D = (-7) ^2-4*1 * (-4) = 49+16=65

    x1 = ( - (-7) - √D) / (2*1) = (7-√65) / 2

    x2 = ( - (-7) + √D) / (2*1) = (7+√65) / 2
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