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SSC Sample Paper Mock Test-3 SSC CGL Tear-II Paper-1

  • question_answer
    If x = 5, y = 3, and z = 2, then find the value of \[{{x}^{2}}+{{y}^{2}}+{{z}^{2}}-2xy+2yz-2zx\]

    A)  3                                

    B)  0  

    C)  2                                

    D)  1

    Correct Answer: B

    Solution :

    \[{{x}^{2}}+{{y}^{2}}+{{z}^{2}}-2xy+2yz-2zx\] \[(\therefore x=5,y=3,z=2)\] \[={{(x-y-z)}^{2}}={{(5-3-2)}^{2}}=0\]  


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