8th Class Mathematics Algebraic Expressions Question Bank Algebra

  • question_answer
    If \[(2,2)\] and y = 1, then the value of \[\left( -\frac{4}{3},2 \right)\] is:

    A)  \[\frac{1}{x}-\frac{3}{4}+\frac{1}{2+x}=0\]                  

    B)  \[\left( 2,-\frac{3}{4} \right)\]

    C)  \[(5,4)\]                      

    D)  \[(-8,0)\]

    Correct Answer: D

    Solution :

    Here, \[x=\frac{\sqrt{3}+\sqrt{2}}{\sqrt{3}-\sqrt{2}}\] Multiplying numerator and denominator to the right hand side by\[x=1\], we get \[y=-1\] Substituting this value for x and the given value for y in \[3x-7y=10\]we get \[xy=-1\] \[9{{x}^{2}}+49{{y}^{2}}\] Multiplying numerator and denominator to right side by \[{{(a+b)}^{3}}-{{(a-b)}^{3}}=\_\_\_\_\_.\]we have \[{{b}^{3}}+3{{a}^{2}}b\] \[2({{b}^{3}}+3{{a}^{2}}b)\]


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