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21The square root of 441 is 21
441 square root
441 has two square roots; 21 or -21.
21
It is 21
Yes because 21 is a rational number
12
21
Yes, they are.
i21 = square root of (-441)
length x length = area length = square root of 441= 21 inches
√441 = √(3^2 × 7^2) = 3 × 7.