Question

Find the value of the polynomial 2x − 2x³ + 7 using given values for x.

x = 3

Answer 1

p(x) = 2x − 2x³ + 7

p(3) = 2 × 3 − 2 × (3)³ +7

= 6 − 2 × 27 + 7

= 6 − 54 + 7

= − 41

Thus, the value of polynomial for x = 3 is −41.