Question

find the value of k in the quadratic equation 5x^2-2kx+20=0 if it has equal roots​

Answer 1

5x  

2

−2kx+20=0

For equal roots, D=0

D=4k  

2

−4(20)(5)=0

⇒k  

2

−100=0

⇒(k+10)(k−10)=0

⇒k=10,−10

Answer 2

Answer:

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