Question

Find the value of k if -1 is a zero of the polynomial p(x)=kx^2-4x+k
Pls answer

Answer 1

check out the image attached

Answer 2

Given :-

-1 is zero of the polynomial

p(x) = kx^2 - 4x + k

p(-1) = 0

k(-1)^2 - 4(-1) + k = 0

k + 4 + k = 0

2k + 4 = 0

2k = -4

$\tt = \dfrac{-4}{2}$

k = -2