Respostas

2014-02-12T21:48:34-02:00
X² - 2x = 0
x.(x-2) = 0
x = 0
x-2 = 0
x = 2
S = {0;2}
1 5 1
2014-02-12T21:48:57-02:00
x²-2x=0 ~> a = 1 , b = -2 , c = 0

Δ = b² - 4ac
Δ = (-2)² - 4.1.0
Δ = 4 - 0
Δ = 4

x = -b 
± √Δ
         2a

x = -(-2) ± √4
          2.1

x = ± 2
        2

x' = 2 + 2 = 4 = 2                x" = 2 - 2 = 0 = 0
         2       2                               2       2

S = {0 ; 2 } 
1 5 1