Question

3x^2-kx-2 =0 , find the value of k if X=5/2​

Answer 1

Answer:

k=67/20 according to mr

Explanation:

3(5/2)²-k(5/2) -2=0

(75/4)-k(5/2)=2

5k=(75/4)-2

5k= (75-8)/4

5k=67/4

k=67/20