Question

find the value of k 2x^2-10x+k​

Answer 1

Answer:

Step-by-step explanation:

2x ^2 - 10 x +k = 0

as we know,

a = 2, b = -10 , c = k

with the help of the formula,

D = b^2 - 4ac

substitute all values,

therefore

D =  -10^2 - 4 x 2 x k

D = 100 - 8k

the equation will have real and equal roots, if D=0

therefore

0 = 100 - 8k

100 = 8k

100/8 = k

25/2 = k

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