Friday, 27 June 2014

DIFFERENCE OF 2 SQUARES - 1


Evaluate 7802 – 6802

Solution

7902 – 6902 = (790 + 690)( 790 – 690)

                   = (1480)( 100)

                   = 148000

Hence 7902 – 6902 = 148000


TRY THIS……………………..


Evaluate 7832 – 6832

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