400 by long division method
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the square root of 400 by long division method
20
_____
_| 400 |_
2 4
____
000
4 0 0
______
0
_______
√400 = 20
400 = 2 * 2 * 2 * 2 * 5 * 5
400 = 2² * 2² * 5²
400 = (2 * 2 * 5)²
400 = 20²
√400 = √20²
√400 = 20
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