Answer:
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1. A= a²
2. Find the square root of the area to find the length of its side length.
3. √81= 9
√89= 9.43
4. For the first square, the side length is a rational number because 9 is a whole number. For the second square, the side length is irrational because the decimals do not repeat themselves.
Y(2y-3)(5y-1) check using foil
