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8th Class Mathematics Factorisation Question Bank Factorisation

  • question_answer
    Amrit and Pankaj expanded \[{{(x-5)}^{2}}\]. Amrit's answer is \[{{x}^{2}}-25\] and Pankaj's answer is \[{{x}^{2}}-10x+25\].Which of the following statements is correct?

    A)  Amrit's answer is correct.

    B)  Pankaj's answer is wrong.

    C)  Both got correct answer.

    D)  Pankaj's answer is correct.

    Correct Answer: D

    Solution :

    \[{{(x-5)}^{2}}={{x}^{2}}-10x+25\] using \[{{(a-b)}^{2}}={{a}^{2}}-2ab+{{b}^{2}}\]. So, Pankaj's answer is correct.


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