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Evaluate (98)3cube

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Evaluate (98)3cube

Posted by Saurav Dhital 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 1 month ago

98³ can be written as (100-2)³
So, we'll use the identity -
(a-b)³= a³-b³-3a²b+3ab²
(100-2)³ = 100³ - 2³ - 3(100)²(2) + 3(100)(2)²
= 1000000 - 8 - 60000 + 1200
= 941192
Answer - 98 ³ = 941192

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CBSE > Class 09 > Mathematics