1.

If the quadratic equation ` p x^2 - 2 sqrt(5) + 15 = 0` has two equal roots, then find value of p.

Answer» Correct Answer - p=3
The given equation is of the form `ax^(2)+bx+c=0,` where
`a=pmb=-2sqrt(5)p" and "c=15.`
`:." "D=(b^(2)-4ac)=(20p^(2)-60p).`
So, `D=0implies20p^(2)-60p=0implies20p(p-3)=0impliesp=3." "[becausepne0]`


Discussion

No Comment Found

Related InterviewSolutions