Find the value of expression (x + y)2 - (x - y)2, if 
.
Asked by Topperlearning User | 26th Nov, 2013, 10:41: AM
Expert Answer:
Given: (x + y)2 - (x - y)2
Putting 
, we get
Answered by | 26th Nov, 2013, 12:41: PM
to obtain 
?
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