5.2915 is. (rounded)
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The square root of 28 minus the squared root of 7 =±2.64575131
It is approximately 5.1769
The square root of 28 or in this case the radical form of 28 will be 2 times radical 7. Since 28 is 4 times 7 and the square root of 4 is two.
√67 = approximately 8.2
The square root of 145 is 12.04 (approx). Since the square root of 144 is 12, it is easy to approximate the square root of 145 because 145 is only very slightly higher than 144.