JEE Math Practice Question
If the system of equations $$2 x+y-z=5$$ $$2 x-5 y+\lambda z=\mu$$ $$x+2 y-5 z=7$$ has infinitely many solutions, then $$(\lambda+\mu)^{2}+(\lambda-\mu)^{2}$$ is equal to
- A.916
- B.912
- C.920
- D.904
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