Question

Resolva as equações x - 5 = -1/x-3

Answer 1

x-5=-1/x-3
(x-3)(x-5)=-1
x²-5x-3x+15= -1
x²-8x+16= 0
∆=b²-4ac
∆=64-64=0
x= -b±√∆/2a
x= 8±0/2
x'= 4
x"= 4
x=4