Question

polynomial p(x) =5x-4x^2=3atx= -1

Answer 1

$p(x) = 5x - 4 {x}^{2} - 3 \\ p( - 1) = 5( - 1) - 4 {( - 1)}^{2} - 3 \\ p( - 1) = - 5 - 4 - 3 \\ p( - 1) = - 12$

hope it helps.