Question

find the product of 98×99​

Answer 1

98 × 99 = 9702

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Answer 2

HELLO DEAR FRIEND

98 × 99
(100-2)(100-1)
let x = 100 , a = 2 , b = 1
(x -a)(x-b) = x²- b(x+a) - ax
100² - 1(100+2) - 2(100)
10000-102-200
= 9702 ans

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