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6 January, 15:10

How do I do this problem show work

Which of the following equations has only one solution? A. x^2 + 4x + 4 = 0 B. x^2 + x = 0 C. x^2 - 1 = 0

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  1. 6 January, 15:15
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    Answer

    A. is the answer

    Step-by-step explanation:

    Determine the number of solutions using the discriminant D=b^2-4 ac

    D=4^-4 x 1 x 4

    simplify the expression

    D = 4^2-4 x 1 x 4

    which is

    D=0

    since D=0, the quadratic equation has 1 real solution
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