Question

if x=1 is zero of polynomial f(x)=x³-2x²+4x+k ,then value of k is?

Answer 1

hope this helps you...

Answer 2

x=1
f (x)=x^3-2x^2+4x+k
f (1)=1^3-2(1)^2+4 (1)+k
0 =1-2+4+k
0=3+k
k=-3