The answer on the second floor is wrong. The sum on the left is 0, and the sum on the right is 1, which must be wrong.

The positive solution is as follows:

Let y =- 1 and z = 2.

Then simplify the formula: 2 root x=x+ 1.

Square the formula and then solve the quadratic equation with one variable.

Get x= 1.

Then when x = 0 and z = 2, the answer is that y has no solution.

Then when x = 0 and y =- 1, the answer is also no solution.

So only X = 1, Y =- 1 and Z = 2 are the unique solutions of the original equation.

Certificate of completion