Question

9 x elevado a 2 - 3 x - 2 = 0

Answer 1

9x²-3x-2=0

∆= (-3)²-4.9.(-2)
∆= 9 +72
∆=81

x=-(-3)±√81/2.9
x= 3±9/18

x1= 3+9/18= 12/18=4/6=2/3

x2= 3-9/18= -6/18= -1/3