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2015-12-24T23:49:51+05:30

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(a+b)^2=a^2+b^2+2ab
5^2=2+2ab
25=2+2ab
2ab=23
ab=23/2=11.5
2 5 2
2015-12-25T10:44:33+05:30
Please see the attachment.
The value of ab is 11.5
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