Question

using algebraic identity evaluate 799^2​

Answer 1

Answer:

799² = 638401  

Step-by-step explanation:

799²

= ( 800 - 1 )²

= ( 800 )² - 2 × 800 × 1 + ( 1 )²        [As ( a - b )² = a² - 2ab + b²]

= 640000 - 1600 + 1

= 638400 + 1                                  [Subtracting 1600 from 640000]

= 638401                                        [Adding 1 to 638400]

Ans:- 638401  

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