Teaching REET Mock Test Series 2024-25 Level 1 & 2 (Hindi-Sanskrit-English) Quantitative Aptitude Algebra Identities
The value of (x - y)(x + y) + (y - z)(y + z) + (z - x)(z + x) is:
1
x² + y² + z²
2
x + y + z
3
0
4
xy + yz + zx
5
Question Not Attempted