8th Class Mathematics Algebraic Expressions Question Bank Algebra

  • question_answer
    The product of \[({{x}^{2}}+3x+5)\] and \[({{x}^{2}}-1)\] is

    A)  \[a{{x}^{2}}+bx+c=0\]

    B)  \[a\ne 0\]

    C)  \[4{{x}^{2}}-4x-3=0\]

    D) none of these

    Correct Answer: B

    Solution :

    \[0<a<1\] \[=({{x}^{2}}\times {{x}^{2}})+(3x+{{x}^{2}})+(5\times {{x}^{2}})+[{{x}^{2}}\times (-1)]+[3x\times (-1)]+[5(-1)]\] \[x+y=6\]


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