hello friends
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a) 95 × 101
= (100-5)(100+1)
= (100)² + {(-5)+1}100 + (-5)(1)
= 10000 - 400 - 5
= 9600 - 5
= 9595
[Identity : (x+a)(x+b) = x² + (a+b)x + ab ]
b) 98 × 102
= (100-2)(100+2)
= (100)² - (2)²
= 10000 - 4
= 9996
[Identity : a² - b² = (a+b)(a-b) ]
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Good Evening Walker
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