The value of the polynomial 5x³ - 4x² + 3 when x = - 1 is

Question: The value of the polynomial 5x³ - 4x² + 3 when x = - 1 is

Solution:
5x³ - 4x² + 3
If x = - 1,
then replace x with - 1,

We get,
5x³ - 4x² + 3 = 5 × (- 1)³ - 4(- 1)² + 3
= - 5 - 4 + 3
= - 6