0
Square root of 5 time square root of 6 is the same as square root of 5 x 6, that is, square root of 30.
The square root of 25 is 5 ... rational.
Square root of 5 = ± 2.236068
Square root of 11 = ± 3.316625
The square root of 27 plus the square root of 5 = 7.4322204
5