Question

If x= -1/2 is a solution of 3x^2 + 2kx - 3 = 0, find k.

Answer 1

$3 {x}^{2} + 2kx - 3 = 0 \\ 3( { - \frac{1}{2} )}^{2} + 2k( - \frac{1}{2} ) - 3 = 0 \\ \frac{3}{4} - k - 3 = 0 \\ k = \frac{3}{4} - 3 \\ k = \frac{3 - 12}{4} = - \frac{9}{4}$

Answer 2

This is very simple.


Hope it helps u