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2014-07-20T18:10:28-03:00
- x² + 5x + 6 = 49/4
- x² + 5x + 6 - (49/4) = 0
- x² + 5x - (25/4) = 0
a = -1
b = 5
c = - 25/4

Δ = b² - 4.a.c
Δ = 5² - 4.(-1).(-25/4)
Δ = 25 - 25
Δ = 0

x = (- b ± √Δ) / 2.a
x = (- 5 ± √0) / 2.(-1)
x = -5 / -2
x = 5/2



2 5 2