Ola Vivian

f(x) = x² - 5x + 6

f(0.2) = 0.2² - 5*0.2 + 6 = 0.04 - 1 + 6 = 5.04

f(0.7) = 0.7² - 5*0.7 + 6 = 0.49 - 3.5 + 6 = 2.99

f(3/4) = 9/16 - 15/4 + 6 = 45/16

f(5/7) = 25/49 - 25/7 + 6 = 144/49

pronto

a)4

b)-1

c)45/16

e)144/49