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Q.

What is the value of ( 11 7 )( 11 + 7 )  after simplifying it?

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a

6

b

1

c

4

d

3 

answer is B.

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Detailed Solution

Given- ( 11 7 )( 11 + 7 )  
We can simplify it as,
11 7 11 + 7 = 11 2 7 2            [(a+b)(ab)= a 2 b 2 ] 11 7 11 + 7 =117 11 7 11 + 7 =4  
Thus, value of ( 11 7 )( 11 + 7 )  after simplifying it is 4  .
Hence, option 2 is the correct option.
 
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