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Q.

The value of 822 is ____.


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Detailed Solution

The value of 822 is 6724.
Given,
822
We know that,
(x+y) 2 = x 2 + y 2 +2xy  
Break the given number.
(82) 2 = (80+2) 2  
⇒ (80) 2 + (2) 2 +2(80)(2)   ⇒6400+4+320   ⇒6724  
Therefore, the value of 822 is 6724.
 
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