Question

Resolva as equações do 2grau: b) 3x² -2x -1=0​

Answer 1

Resposta:

∆=b²-4 a. c

∆=(-2)²-4.3.-1

∆=4 + 12

∆= 16

x=-b/+-✓∆/2a

x=-(-2)+/-✓16/2.3

x=2+/-4/6

x1= 6/6= 1

x2= -4/6

X2= -2/3