Question

Find the value of p (x) = 4x^3 - 7x^2 - 5x + 43 if x= -3

Answer 1

- 113

Explanation:

Substitute x = - 3 into p(x) and evaluate , that is

p(- 3) = 4(- 3)³ - 7(- 3)² - 5(- 3) + 43

= 4(- 27) - 7(9) + 15 + 43

= - 108 - 63 + 58

= - 171 + 58

= - 113

Answer 2

`p(x) = {4x}^(3) - {7x}^(2) - 5x + 43 \\ \\ p( - 3) = {4( - 3)}^(3) - {7( - 3)}^(2) - 5( - 3) + 43 \\ p( - 3) = - 113`