Question

Como resolve essa equacao ? 2x^2+x=1

Answer 1

2x²+x-1=0

∆= 1²-4.2.(-1)
∆= 1+8
∆=9

x= -1+-√9/2.2

x1= -1+3/4= 2/4=1/2

x2= -1-3/4= -4/4= -1