# Find the value of the given expression :

__649×649+351×351-649×351__

649x649x649+351+351+351

- 1/1000
- 1/298
- None of these
- 149/500

**Answer: (1) 1/1000**

**Explanation:-**

(649 x 649 + 351 x 351 – 649 x 351)/(649 x 649 x 649 + 351 x 351 x 351)

(649² + 351² – 649 x 351)/(649³ + 351³)

**Formula-**

**a³ + b³ = (a + b) (a² + b² – ab)**

Then, (649² + 351² – 649 x 351)/ (649 + 351) (649² + 351² – 649 x 351)

1/1000

Hence, the answer is (1) 1/1000.