Question

For what value of P(x) =x^4 -2x^3+3x^2 - 9x

Answer 1

Answer:

x^4-2x^3+3x^2-9x

if we take x-1=0

=x=1we put it on x

=1^4-2×1^3+3×1^2-9×1

= 1-2+3-9

= -1-6

=-7