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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

5^2=2+2ab

25=2+2ab

2ab=23

ab=23/2=11.5

Please see the attachment.

**The value of ab is 11.5**