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