Question

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

Answer 1

let p(x)=4×3+3×2-4x+k

let p(x)=0,then

4×3+3×2-4x+k=0

12+6-4(1)+k=0

12+6-4+k=0

18-4+k=0

14+k=0

k=-14