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Algebraic Identity: (a - b)^2 = a^2 + b^2 - 2ab

Find the leng...

Question

Find the length of the side of a square whose area is 441 m².

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Solution

Let the length of the side of the square be x m.

Area of square = (x)² = 441 m²

The square root of 441 can be calculated as follows.

21

2

41

041

41

0

∴

Hence, the length of the side of the square is 21 m.

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