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Mathematics

Grade10

Easy

Question

Find the product. 102*98

9996
9876
9596
9436

The correct answer is: 9996

102*98 = (100 + 2)(100 – 2)
Using the pattern $left parenthesis a plus b right parenthesis left parenthesis a – b right parenthesis equals a squared – b squared comma$
$100 plus 2 right parenthesis left parenthesis 100 – 2 right parenthesis equals 100 squared – 2 squared equals 10000 – 4 equals 9996$

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