1.

the value of `249^(2)-248^(2)` isA. `1^(2)`B. 477C. 487D. 497

Answer» Correct Answer - D
Now `249^(2)-248^(2)=(249+248)(249-248) " " ["using identity ," a^(2)-b^(2)=(a-b)(a+b)]`
`497xx1=497`


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