Question

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

x = -1

Answer 1

p(− 1) = 2 × (− 1) - 2 × (− 1)³ + 7

= − 2 − 2 × (− 1) + 7

= − 2 + 2 + 7

= 7 
Thus, the value of polynomial for x = −1 is 7.