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First note that 84=4x21 and 4 is a perfect square. So square root of (84)=square root (4x21)=Square root (4) Square root (21)= 2 multiplied by the square root of 21. You can also write this using rational exponents, but this is not in radical form. It is an equivalent expression, however. 2 x (21)1/2
Common factors are any numbers that are factors of each. The greatest common factor therefore is the largest number that appears in both lists. Factors of 52 1, 2, 4, 13, 26, 52 Factors of 84 1, 2, 3, 4, 6, 7, 12, 14, 28, 42, 84 Common factors would be - 4, 2, and 1 Therefore the greatest common factor is 4.
The square root of 7056 is 84.
84
The highest common factor is 7