find K if x+1 is a factor of 4x³+3x²-4x+k
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(x +1) is factor of equation
x=-1
putting value of x in givn eq
=4×(-1)^3 + 3×(-1)^2 -4×(-1)+k =0
-4 +3 +4 +k =0
3+k =0
k = -3
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