It would be 2 root 10.
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The square root of 400, also known as 20.
Simplified radical form?sqrt(22 * 10)= 2sqrt(10)========= ( about 6.325 )
Take out the largest perfect square you can find, in this case, 4: root(40) = root(4 x 10) = root(4) x root(10) = 2 x root(10).
Square root of 40 approximately = 6.324555325 / square root of 40 = 0.790569415
NO!!! '40' is the square root of '1600' The square root of '600' is 24.49489743...