The square root of 5 is closer to 2. 2 squared is 4 and 3 squared is 9. 4 is much closer to 5 than 9.
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The square root of 3 falls between 1 and 2. (It is closer to 2 though)
3*3=9 and 4*4=16. Therefore the square root of 13 is closer to 4 than to 3.
3(3 square root of 2) = 9(square root of 2)
1.4142135 is the square root of 2 1.7320508 is the square root of 3 2.0000000 is the square root of 4
2 times the Square root of 3 + 4