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Math Help - Find the values that give the function only one solution

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    Find the values that give the function only one solution

    For which values of the constant d does the function x^2+(d-1)x+d have only one solution? State an exact answer. Thank you in advance!
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    Quote Originally Posted by Anna55 View Post
    For which values of the constant d does the function x^2+(d-1)x+d have only one solution? State an exact answer. Thank you in advance!
    What value(s) of d make the discriminant zero.
    You know: b^2-4ac=0
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    I do not understand. Don't I need to know the value of a and c to make the discriminant equal zero?
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    b^2-4ac refers to the notation used in the standard quadratic form which is ax^2+bx+c=0

    For you a = 1 and b= d-1 and c = d
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