2ײ+ ×=1formula de Bhaskara
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2x² + x = 1
2x² + x - 1 = 0
Δ = b² - 4ac
Δ = 1¹ - 4.2.-1
Δ = 1 + 8
Δ = 9
x = -b +-√Δ/2a
x = -1 +-√9/2.2
x = -1 +-3/4
x' = -1+3/4
x' = 2/4
x' = 1/2
x'' = -1-3/4
x'' = -4/4
x'' = - 1 S = { - 1 , 1/2 } ok
2x² + x - 1 = 0
Δ = b² - 4ac
Δ = 1¹ - 4.2.-1
Δ = 1 + 8
Δ = 9
x = -b +-√Δ/2a
x = -1 +-√9/2.2
x = -1 +-3/4
x' = -1+3/4
x' = 2/4
x' = 1/2
x'' = -1-3/4
x'' = -4/4
x'' = - 1 S = { - 1 , 1/2 } ok
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