Tìm x, 3x - 4² = 9(x - 1)(x + 1)

1> 3x -4²=9(x-1)(x+1)
2> (3x-5)²-4(x-2)²=0
3> 3x²-2x-16=0
4> x-3/x = 2- x-3/x+2
5> x+3/x-3 + 48x³/9-x²= x-3/x+3