Question

Me ajudem po favorX levado a 2-x-2=0

Answer 1

x²-x-2=0

∆=b²-4.a.c

∆= (-1)²-4.1.(-2)

∆=1+8

∆=9

x= -b±√∆/2.a

x'=-(-1)+√9/2.1

x'=1+3/2

x'=4/2

x'= 2

x"= 1-3/2

x"= -1