Question

If x = - 1 2 , is a solution of the quadratic equation 3 x 2 + 2 k x - 3 = 0 , find the value of k.

Answer 1

Here's You're Answer

____________
It is given that x = - 1 2 is the solution of the quadratic equation 3 x 2 + 2 k x - 3 = 0 . 

∴ 3 - 1 2 2 + 2 k - 1 2 - 3 = 0 

⇒ 3 4 - k - 3 = 0 ⇒ k = 3 4 - 3 = - 9 4 

Hence, the value of k is - 9 4 .

Answer 2

Hey mate here is ur answer........

= 3 x 2 + 2 k x - 3 = 0

= 3 - 1 2 2 + 2 k - 1 2 - 3 = 0

= 3 4 - k - 3 = 0

= k = 3 4 - 3 = - 9 4

Hope it helps♥