Question

dada a funçao f(x)=x2-4x+3 calcular

a)f(-1)
b)f(0)
c) f(1)
d) f(2)

Answer 1

a) f(-1)

f(-1) = (-1)² - 4.(-1) + 3
f(-1) = 1 + 4 + 3
f(-1) = 8


b) f(0) 

f(0) = (0)² - 4.(0) + 3
f(0) = 0 + 0 + 3
f(0) = 3


c) f(1) 

f(1) = (1)² - 4.(1) + 3
f(1) = 1 - 4 + 3
f(1) = 0


a) f(2) 

f(2) = (2)² - 4.(2) + 3
f(2) = 4 - 8 + 3
f(2) = -1