I need help on this question and quick ><

Find the value ofkfor which5 + 4x - x^2 = k, hasequal roots.

To just lets you's know,k=9.

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- May 12th 2008, 03:19 AMxornr89Discriminant =(
I need help on this question and quick ><

Find the value of**k**for which**5 + 4x - x^2 = k**, has**equal roots**.

To just lets you's know,**k=9**. - May 12th 2008, 03:25 AMangel.white
- May 12th 2008, 06:52 AMSVXX
Alternately we could do this with the discriminant formula..

For equal roots, D = 0.

So x = 2.

Substituting..

k = 9.