Question

find the value of k ,if x-1 is a factor of 4x3+3x2+4x+k

Answer 1

then zero will be 1
f(1)=4×1×3+3×1×2+4×1+k=0
=12+6+4+k=0
=22+k=0
=k= -22

Answer 2

X-1=0
x=1
p(x)=0
4x^3+3x^2+4x+k=0
Substitute x=1 in the places of 'x'
So
K=-11
Hope it helps
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