To get the square root of 8, you have to multiply the root of 2 and the root of 4.
The root of 4 then simplifies to 2, so the square root of 8 equals 2 times the square root of 2.
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Factor under the radical. sqrt(72) sqrt(3^2 * 8) 3sqrt(8) 3sqrt(2^2 * 2) 6sqrt(2) check and you see that sqrt(72) and 6sqrt(2) are equivalent
2.82842712474619 or roughly 283/100 as a fraction
8 is a perfect cube; it is not a perfect square. Its square root is a fraction and the square root of a perfect square is always an integer....you're thinking of 9...
It is 8*sqrt(5)
The geometric mean of two numbers is the square root of their product. 18 x 8 = 144. The square root of 144 is 12. The geometric mean of 18 and 8 is 12.