Respostas

2014-08-06T21:15:36-03:00
Olá, Viihy!

f(x) = 3x² - 4x + 1
f(-1) = 3.(-1) - 4(-1) + 1
f(-1) = -3 - (-4) +1
f(-1) = -3 + 4 + 1
f(-1) = 1 + 1
f(-1) = 2
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