Question

Find the value of the polynomial P(y) = 2 y - 2 y^3 + 7 using the given values of y . a) y = 3 b) y = - 1 c) y = 0 d ) y = - 2​

Answer 1

Answer:

p(y)=2y-2y^3+7

if y=3

then

p(3)=2(3)-2(3)^3+7

=6-2(27)+7

=6-54+7

=13-54

-41

y=-1

p(-1)=2(-1)-2(-1)^3+7

=-2-2(-1)+7

=-2+2+7

=7

y=0

p(0)=2(0)-2(0)^3+7

=0-0+7

=7

y=-2

p(-2)=2(-2)-2(-2)^3+7

=-4-2(-8)+7

=-4-16+7

=-20+7

=-13