1 votes 1 votes One root of $x^{2} + kx – 8 = 0$ is square of the other. Then, the value of k is: $2$ $8$ $-8$ $-2$ Quantitative Aptitude cat1995 quantitative-aptitude quadratic-equations + – makhdoom ghaya asked Aug 30, 2017 makhdoom ghaya 8.1k points 627 views answer comment Share See all 0 reply Please log in or register to add a comment.
Best answer 3 votes 3 votes Let the roots of the quadratic equation be α and α2. Product of roots = α*α2 = -8 α3 = -8 α = -2 Roots are -2 and 4 , now put the roots in given equation 42 + 4k - 8 = 0 k = -2 Option D is Correct. Shubham Sharma 2 answered Sep 9, 2017 selected Sep 9, 2017 by Arjun Shubham Sharma 2 3.0k points comment Share See all 0 reply Please log in or register to add a comment.