Question

If p(x)=10x^2-4x+2 then find p(2)-p(-1)+p(1/2)

I will mark as brainliest if you answer it correctly..

Answer 1

p(x) = 10x^2 - 4x + 2

For p(2), p(-1), p(1/2) just put the bracket values in place of x

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

=> 10(2)^2 - 4(2) + 2 - (10(-1)^2 - 4(-1) + 2) + 10(1/2)^2 - 4(1/2) + 2

=> 40 - 8 + 2 - (10 + 4 + 2) + 5/2 - 2 + 2

=> 34 - 16 + 5/2

=> 18 + 5/2

=> (36 + 5)/2

=> 41/2

Answer 2

p(x) = 10x² - 4x + 2.

Therefore, p(2) = 10(2)² - 4(2) + 2 = 40 - 8 + 2 = 34.

                  p(-1) = 10(-1)² - 4(-1) + 2 = 10 + 4 + 2 = 16.

                  p(1/2) = 10(1/2)² - 4(1/2) + 2 = 5/2.

∴ p(2)- p(-1) + p(1/2) = 34 -16 +5/2 = 18 + 5/2 = 20.5 = 41/2.