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7th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-14

  • question_answer
    What must be subtracted from\[5{{a}^{2}}-10ab-5{{b}^{2}}-1\] to get \[4{{a}^{2}}-7ab-4{{b}^{2}}+1\]?

    A)  \[-\,{{a}^{2}}+ab+{{b}^{2}}-2\]     

    B)  \[{{a}^{2}}+3ab+4{{b}^{2}}+2\]

    C)  \[{{a}^{2}}-3ab-{{b}^{2}}-2\]          

    D)  \[{{a}^{2}}-3ab-{{b}^{2}}+2\]

    E)  None of these

    Correct Answer: C

    Solution :

     Not Available


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