Question

resolva a equação 2x²+x-1=0

Answer 1

2x²+x-1= 0

a= 2/ b= 1/ c=-1

∆= 1²-4.2.(-1)
∆= 1-(-8)
∆= 9

x= -1+-√9/2.2
x= -1+-3/4

x'= -1+3/4 = 2/4= 1/2
x''= -1-3/4 = -4/4= -1