Question

me ajude nesses cálculor

Answer 1

f(-1) = x² + 2x
f(-2) = x² - 4x + 1
f(3) = 3x² + 27

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

f(-2) = (-2)² - 4 . (-2) + 1
f(-2) = 4 - (-8) + 1 
f(-2) = 4 + 8 + 1
f(-2) = 13 

f(3) = 3x² + 27
f(3) = 3 . 3² + 27
f(3) = 3 . 9 + 27
f(3) = 27 + 27
f(3) = 54