jika x-1/x = 4 ; berapa nilai x?

x-1/x =4
x^2 =4+1
x = akar dari 5
kalau salah maaf

x-1/x=4
kali x
x²-1=4x
x²-1-4x=(-b+√(b²-4ac))/2a
x=4+√(16+4)/2
x=4+√20/2
x=4+√5
x1=4-√5

x2=4+√5