Question

-x²+ 6- 5= 0
equaçao do 2 grau

Answer 1

∆= b²-4ac
∆= 6²-4(-1)(-5)
∆= 36-20
∆= 16

x=-b±√∆/2a
x=-6±√16/2(-1)

x'=-6+4/-2
x'= -2/-2
x'= 1

x"= -6-4/-2
x"= -10/-2
x"= 5