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7th Class Mathematics Algebraic Expressions Question Bank Algebraic Expressions

  • question_answer
    The value of the expression \[(2{{x}^{2}}+2xy-y-1)\] is 1 at\[x=0\]. What is the value of y?

    A) \[-2\]    

    B)  2             

    C)  3                                

    D)  4

    Correct Answer: A

    Solution :

    (a) At \[x=0:(0+0-y-1)=1\] \[\Rightarrow \]\[-2=y\]               


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