Question

f(x) = 2x^3 + x² – 5x + 2; 1/2,1,-2​

Answer 1

Answer:

f(x) = 2x³ + x² - 5x + 2

f(1/2) = 2(1/2)³ + (1/2)² - 5(1/2) + 2

= 1/4 + 1/4 - 5/2 + 2

= 0

f(1) = 2(1)³ + 1² - 5*1 + 2

= 2 + 1 - 5 + 2

= 0

f(-2) = 2(-2)³ + (-2)² - 5(-2) + 2

= -16 + 4 + 10 + 2

= 0