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Q.

Find the value of (703) 2  .


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a

994420

b

209494

c

944902

d

494209 

answer is D.

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Detailed Solution

Given expression is (703) 2  .
Using the identity,
a+b 2 = a 2 + b 2 +2ab  
Expanding the expression,
(703) 2 = 700+3 2 ⇒ (703) 2 = 700 2 + 3 2 +2×700×3 ⇒ (703) 2 =490000+9+4200 ⇒ (703) 2 =494209   Therefore, the value of (703) 2  is 494209.
Hence, option 4 is correct.
 
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