For which values of the constantddoes the function x^2+(d-1)x+d have only one solution? State an exact answer. Thank you in advance!

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- Mar 18th 2011, 12:35 PMAnna55Find 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! - Mar 18th 2011, 12:42 PMPlato
- Mar 18th 2011, 01:03 PMAnna55
I do not understand. Don't I need to know the value of a and c to make the discriminant equal zero?

- Mar 18th 2011, 01:05 PMe^(i*pi)
$\displaystyle b^2-4ac$ refers to the notation used in the standard quadratic form which is $\displaystyle ax^2+bx+c=0$

For you $\displaystyle a = 1$ and $\displaystyle b= d-1$ and $\displaystyle c = d$