Question

Evaluate (98) whole cube by using suitable identity

Answer 1

here is the answer... i hope u seem this right thank you

Answer 2

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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