Question

if p(x) = 2x cube - x square + 3x +1 , find the value of p(-1) + p(1) - p(2)​

Answer 1

2x^3-x^2+3x+1
p(x)
i)p(-1)=2(-1)^3-(-1)^2+3(-1)+1
=2*-1-1+(-3)+1
=-2-1-3+1
=-5
ii)p(1)=2(1)^3-(1)^2+3*1+1
=2*1-1+3+1
=2-1+3+1
=5
iii)p(2)=2(2)^3-(2)^2+3*2+1
=2*8-4+6+1
=16-4+6+1
=19
So, p(-1)+p(1)-p(2)
=-5+5-19
=-19 Ans.
Mark as brainliest

Answer 2

p(x)=2x³-x²+3x+1

p(-1)=2(-1)³-(-1)²+3(-1)+1

=-2-1-3+1

= -5

p(1)=2(1)³-(1)²+3(1)+1

=2-1+3+1

=5

p(2)=2(2)³-(2)²+3(2)+1

=16-4+6+1

=19

p(-1)+p(1)-p(2)

-5+5+19

=19