Question

If x = - 1 what is the value of the polynomial 2x³+ 2x

Answer 1

Answer:

Putting the value of x = -1 in the polynomial.

2×(-1)³ +2×(-1)

-2 + (-2)

-2-2

-4.

Answer 2

Answer:

${2x}^{2} + 2x$

$= {2( - 1)}^{2} + 2( - 1)$

=2-2

=0