Respostas

2014-05-30T16:24:00-03:00
x^2-2x-6=-6 \\ x^2-2x-6+6=0 \\ x^2-2x=0

Δ = (-2)^2-4.1.0
Δ = 4-0
Δ = 4

X = \frac{-(-2)+- \sqrt{4} }{2.1} =>X= \frac{2+-2}{2}

x' =  \frac{2+2}{2} => \frac{4}{2} =2                      x" =  \frac{2-2}{2} => \frac{0}{2} =0

Prova Real
f(2) = 2^2-2.2-6 \\ f(2)=4-4-6 \\ f(2)=-6  \\  \\ f(0) = 0^2-2.0-6 \\ f(0) = -6