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7 squared can be expressed as a product of the same factor by multiplying 7 by itself. Therefore, 7 squared can be written as 7 x 7.
7% is the same as 7/100 which is .07
7 -1 same as 1/7 ===
7 x 7 = 49
It is: the square root of 7 times the square root of 7 = 7