Question

If one zero of the quadratic polynomial kx² + 3x + k is 2 then the value of k is ______.

पर्याय

• `5/6`

• `(-5)/6`

• `6/5`

• `(-6)/5`

Answer 1

If one zero of the quadratic polynomial kx² + 3x + k is 2 then the value of k is `underlinebb((-6)/5)`.

Explanation:

x = 2 satisfies kx² + 3x + k = 0.

∴ 4k + 6 + k = 0

⇒ 5k = –6

⇒ `k = (-6)/5`