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Q.

The expanded form of 3x−5 3   is


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a

27 x 3 +135 x 2 +225x−125  

b

27 x 3 +135 x 2 −225x−125  

c

27 x 3 −135 x 2 +225x−125  

d

None of these 

answer is C.

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Detailed Solution

According to the given information, the given expression is (3x−5) 3  .
Applying the standard algebraic identity, Question Image, we get,
Question ImageThus, the expanded form of (3x−5) 3   is 27 x 3 −135 x 2 +225x−125  .
Therefore option 3 is correct.
 
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