defence exam CRPF Constable Tradesmen & Technical 2023 Mock Test Quantitative Aptitude Algebra Identities
If \(\frac{x}{b + c -a } = \frac{y}{b - c - a} = \frac{z }{a + b -c} = k\) then what is x2 + y2 + z2 - 2xy - 2yz + 2zx equal to ?
1
k2(a2 + b2 + c2)
2
k2(a2 - b2 + c2)
3
k2(a + b + c)2
4
k2(a - b + c)2