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Suppose that 2x^2 - 5x + k = 0 is a quadratic equation with one solution for x. Express k as a common fraction.

 Dec 26, 2018
 #1
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2x^2 - 5x  + k  = 0

 

If there is one real solution, the discriminant must = 0.....so...

 

5^2   - (4) (2) (k) = 0

 

25 - 8k = 0

 

25 = 8k

 

k =  25 / 8

 

 

cool cool cool

 Dec 26, 2018

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