Respostas

2014-07-21T13:04:27-03:00
2x² - 12x + 18 = 0
Δ = (- 12)² - 4.2.18
Δ = 144 - 144
Δ = 0

x = 12 + - √ 0 / 4
x = 12 + - 0 / 4

x ' = 12 + 0 / 4 = 12 / 4 = 3

x '' = 12 - 0 / 4 = 12 / 4 = 3
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