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5 September, 22:56

Use the quadratic formula to solve the quadratic equation x2 - 8x - 4 = 0.

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  1. 5 September, 23:20
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    Hello here is a solution:

    x² - 8x - 4 = 0.

    quadratic equation ax²+bx+c = 0 when : a=1 and b = - 8 and c = - 4

    discriminant : d = b²-4ac d = (-8) ²-4 (1) (-4) = 64+16 = 70

    x = (-b-rot (d)) / 2a x' = (-b+rot (d)) / 2a ... conrinu
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