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8th Class Mathematics Factorisation Question Bank Factorization

  • question_answer
    If \[\mathbf{a}=\mathbf{2},\mathbf{b}=\mathbf{1}\] then \[{{\mathbf{a}}^{\mathbf{2}}}+{{\mathbf{b}}^{\mathbf{2}}}+\mathbf{2ab}=\]

    A)  9    

    B)  4            

    C)  2                    

    D)  1

    Correct Answer: A

    Solution :

    (a): Just put the value of 'a' & 'b' Or Write \[{{a}^{2}}+{{b}^{2}}+2ab={{\left( a+b \right)}^{2}}\] Now put \[a=2,b=1\] \[={{\left( 2+1 \right)}^{2}}=9\].         


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