Question

Resolva a equação: -x²+2x+2=0

Answer 1

a= -1
b= 2
c= 2

∆= b²-4.a.c
∆= 2²-4.(-1).2
∆= 4+8
∆= 12

x=(-b±√∆) / (2.a)
x=(-2±√12) / (2.(-1))
x=(-2±3,46) / -2
x'= 1,46 / -2 x' = -0,73
x"= -5,46 / -2 x"= 2,73