Respostas

2014-05-22T00:11:38-03:00
2014-05-22T00:15:18-03:00
F(x)= -3x² -4x +4
-3x² -4x +4=0
a= -3  b= -4  c=4
Δ= b² -4.a.c
Δ=(-4)² -4.-3 .4
Δ=16 + 48
Δ=64
x= \frac{-b+- \sqrt{Δ} }{2.a}
x= \frac{-(-4)+- \sqrt{64} }{2.-3}
x'= \frac{4+8}{-6}
x'= \frac{12}{-6}
x'=-2
x''= \frac{4-8}{-6}
x''= \frac{-4}{-6}
x''=0,666...