Question: Are x, y, z equal, where x, y, z are real numbers?
Statement-I: x2 + y2 + z2 - xy - yz - zx = 0
Statement-II: x3 + y3 + z3 - 3xyz = 0
1
if the question can be answered by using one of the statements alone, but cannot be answered using the other statement alone.
2
if the question can be answered by using either statement alone.
3
if the question can be answered by using both the statements together, but cannot be answered using either statement alone.
4
if the question cannot be answered even by using both the statements together.