Question

2ײ+ ×=1formula de Bhaskara

Answer 1

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