Question

The square root of 8(5 square root of 4 - 6 square root of 9)

Answer 1

the square root of 8 is 2.82
the square root of 5 is 2.23
the square root of 4-6 is 1.41 (unless you mean the square root of (4) -6 then it's -4)
the square root of 9 is 3