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Factorise 1)(l+m)square-(l-m)square

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Factorise 1)(l+m)square-(l-m)square

    • Posted by Dhruv Patel 6 years, 8 months ago

    CBSE > Class 08 > Mathematics
    • 1 answers

    Sia ? 6 years, 8 months ago

    (l + m)2 – (l – m)2
    = l{(l + m) – (l – m)} {(l + m) + (l – m)} . . . . [Applying Identity III
    = (2m) (2l)
    = 4lm

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