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11x13=(12-1)×(12+1)=?

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11x13=(12-1)×(12+1)=?

    • Posted by सुरेश सुरेश गौर 5 years, 9 months ago

    CBSE > Class 07 > Mathematics
    • 2 answers

    Shree Dhar Mishra 5 years, 9 months ago

    11 X 13=(12-1) X (12+1) =11X13=11X13 =12²-1² =143

    0Thank You

    Yogita Ingle 5 years, 9 months ago

    11 x 13 

    = (12-1)×(12+1)         [ ∵ a2 - b2 = (a-b)(a+b)]

    = 122 - 12

    = 144 - 1

    = 143

    0Thank You

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