Question

if one of the root of the quadratic equation kx^2+2x-8=0is -2 then what is the value of k​

Answer 1

Answer:

• k = 3

Explanation:

Given polynomial,

⇒ p(x) = kx² + 2x - 8 = 0

Where one the root is -2

We need to find the value of ‘k’

Substituting the value of x in p(x)

⇒ p(-2) = k(-2)² + 2(-2) - 8

⇒ k(4) - 4 - 8 = 0

⇒ 4k - 12 = 0

⇒ 4k = 12

⇒ k = 12/4

⇒ k = 3

Hence, the value of ‘k’ is 3

Answer 2

Answer:

Hence,The value of k is 3!!!

Hope this helps u mate ✔️