Question

P(x) =x cube - 3 x square - 9x-5+x+1

Answer 1

$p(x) = {x}^{3} - 3 {x}^{2} - 9x - 5 + x + 1 \\ p(x) = {x}^{3} - 3 {x}^{2} - 9x + x - 4 \\ p(x) = {x}^{3} - 3 {x}^{2} - 8x - 4$

putting x=1

$p(1) = 1 - 3 - 8 - 4 \\ p(1) = - 14$

Hope my answer will help you