Question

Find the value of k, for which one root of the quadratic equation kx^2+4x-12=0 is 2

Answer 1

putting value of x in equation
$k {2}^{2} + 4 \times 2 - 12 = 0 \\ 4k + 8 - 12 = 0 \\ 4k - 4 = 0 \\ 4k = 4 \\ so \: k = 1$