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15 August, 20:47

What is the value of the discriminant, b2 - 4ac, for the quadratic equation 0 = x2 - 4x 5, and what does it mean about the number of real solutions the equation has?

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  1. 15 August, 21:22
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    D = b^2 - 4ac, where a = 1, b = - 4, c = 5

    d = (-4) ^2 - 4 x 1 x 5

    d = 16 - 20

    d = - 4

    Since d is negative, this means that there is no real solution to the equation.
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