DIFFERENCE OF 2 SQUARES 1

Evaluate 1237² – 763²

Solution

1237² – 763² = (1237 + 763)( 1237 - 763)

                     = (2000)( 474)

                     = 948000    [after multiplying 2 and 474 and adding three zeros]

Hence 1237² – 767² = 9484000

TRY THIS……………………

Evaluate 1770² – 1230²