Question

Q1) Find the value of the polynomial p(x) = 4x -3x³ +9 at x = -2.​

Answer 1

$\implies$ p(x) = 4x - 3x³ + 9

$\implies$ x = (-2)

$\implies$ Value of polynomial = [4 × (-2) - 3 × -2³) + 9]

$\implies$ Value of polynomial = 25

Answer 2

$p(x) = 4x - 3 {x}^{3} + 9$

$p(x) = 4( - 2) - 3( { - 2)}^{3} + 9$

$p(x) = - 8 - 3( - 8) + 9$

$p(x) = - 8 + 24 + 9$

$p(x) = - 8 + 33$

$p(x) = 25$