Respostas

2014-07-22T10:42:34-03:00
Olá, Ualissonceles!

x² + 2.x.5 + 5²
x² + 10x + 25

a = 1
b = 10
c = 25

Δ = b² - 4.a.c
Δ = 10² - 4.1.25
Δ = 100 - 100
Δ = 0

-b / 2a
-10 / 2
-5
1 3 1
2014-07-22T11:46:05-03:00
(x-5) . (x-5) = 1
x² - 5x -5x +25 =1
x² - 10x +24 = 0
Δ= 100-96
Δ=4
x= 10 +- 2
       2

x¹=12/2 = 6
x²= 8/2 = 4
1 5 1