Question

Find p (-1) for polynomial p(x) = 5x - 4x² + 3​

Answer 1

$p( - 1) = 5( - 1) - 4( - 1) {}^{2} + 3 \\ = - 5 - 4 + 3 \\ = - 6$

Answer 2

p(x) = 5x - 4x² + 3

Keep -1 in the place of x

$p( - 1) = 5( - 1) - 4( - 1) {}^{2} + 3 \\ - 5 - 4 + 3 \\ - 6$