Question

if -3 is one of the zero of the polynomial (k-1) x²- kx -3 then the value of k is:
a) -1/2
b) 1/2
c) -2
d) 2

PLEASE ASAP!!!

Answer 1

(K-1)9 + 3k-3=0
9k-9+3k-3=0
12k=12
K=1