Question

f(x)=2x2-6x-4
calcule :
f(1)
f(-4)
f(1/2)

Answer 1

Vamos lá

f(x) = 2x² - 6x - 4

f(1) = 2*1² - 6*1 - 4 = 2 - 6 - 4 = -8

f(-4) = 2*(-4)² - 6*(-4) - 4 = 32 + 24 - 4 = 52

f(1/2) = 2*(1/2)² - 6/2 - 4 = 1/2 - 6/2 - 8/2 = -13/2