Using a suitable identity, find the value of (85×115)
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(100-15) (100+15)
(100)² - (15)²
10000 - 225
9775
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(100-15)(100+15)
Using Id- (a+b)(a-b)=a^2-b^2
=100^2-15^2
10000-225
9775
Using Id- (a+b)(a-b)=a^2-b^2
=100^2-15^2
10000-225
9775
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