A) \[(\alpha +\beta )(x+y)=2\,\alpha \beta xy\]
B) \[\alpha \beta \,(x+y)=xy\,(\alpha +\beta )\]
C) \[\alpha \beta \,(x+y)=2xy\,(\alpha +\beta )\]
D) \[\alpha \beta \,(x-y)=2xy\,(\alpha -\beta )\]
E) None of these
Correct Answer: C
Solution :
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