(i)
Given equation:
Putting in the given equation, we get:
So, it satisfies the given equation.
(ii)
Given equation:
Putting in the given equation, we get:
≠
So, it does not satisfy the given equation.
(iii)
Given equation:
Putting in the given equation, we get:
≠
So, it does not satisfy the given equation.
(iv)
Given equation:
Putting in the given equation, we get:
So, it satisfies the given equation.
Hence, are the solutions of the given equation.