Simplify the following using identities.
(a) 101 x 99
(b) 202 x 198
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Answer:
a) 101 * 99 = (100+1) (100-1)
= 100² - 1²
= 10000 - 1 = 9,999
b) 202 * 198 = (200+2)(200-2)
= 200² - 2²
= 40000 - 4 = 39,996
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