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Question

Simplify:
(4x+3y)(4x3y) 


  1. 16x2+24xy+9y2 

  2. 16x2+9y2 

  3. 16x29y2 

  4. 16x224xy+9y2 


Solution

The correct option is C

16x29y2 


To simplify : (4x+3y)(4x3y) 

Using the identity,
(a+b)(ab)=a2b2

Here,
 a=4x and  b=3y,

So,
(4x+3y)(4x3y)=(4x)2(3y)2=16x29y2

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