Question

find the value of k, if -1 is a zero of the polynomial of p(x) =kx square -4x + k​

Answer 1

p(x)=kx²-4x+k

as -1 is zero of polynomial

So,x= -1

p(-1)=k(-1)²-4(-1)+k

= k+4+k

So, 2k+4=0

2k=0-4

2k= -4

k= -4/2

k= -2