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If 2[log(x+y)-log5]=logx+logy, then what...

If `2[log(x+y)-log5]=logx+logy`, then what is the value of `x^(2)+y^(2)` ?

A

`20-xy`

B

23 xy

C

`25-xy`

D

28 xy

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The correct Answer is:
B
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