Describe and correct the error in finding the difference. A note marked incorrect shows the steps of solving an equation. First line. The quantity x squared plus x, end quantity minus the quantity 2 x squared minus 3 x, end quantity is equal to x squared plus x minus 2 x squared minus 3 x. Second line. Is equal to the quantity x squared minus 2 x squared, end quantity plus the quantity x minus 3 x, end quantity. Third line. Is equal to negative x squared minus 2 x.