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Which of the following is an identitiy ?...

Which of the following is an identitiy ?

A

`( p + q) ^(2) = p ^(2) + q ^(2)`

B

`p ^(2) - q ^(2) = ( p -q) ^(2)`

C

`p ^(2) - q ^(2) = p ^(2) + 2pq = q ^(2)`

D

`(p+ q) ^(2 )= p ^(2) + 2 pq + q ^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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