Question

P(x)=(x³+3x²-4x+5) (x-1)

Answer 1

(x-1) is not the factor of (x^3+x^2-4x+5)

as:x-1=0

x=1

now put in equation.

(1)^3+3×(1)^2-4×1+5

1+3-4+5

5≠0