Question

i have no idea what this means. please explain: Evaluate f(3) - f(5) for 2x^3 - 5x

Answer 1

that means plug in those values for x to evealuate the function

Answer 2

f(3) = 2 (3)^3 - 5(3)

Answer 3

f(3) - f(5)


(2(3)^2-5(3)) - (2(5)^2-5(5))


(2(9)-5(3)) - (2(25)-5(5))


(18-15) - (50-25)


3-25


-22


So f(3) - f(5) = -22

Answer 4

thanks everyone