The two sides of the triangle are .

Let the length of the other side is y.

Perimeter of the triangle is the sum of the lengths of three sides.

So, the perimeter is

In triangle length of the third side should not be zero i.e .

Therefore,

Find the roots of the function which is in the form .

The roots are .

.

The perimeter of the triangle with the sides , and y  should be

  where and .

Here x may take all values except , and y should not be zero.