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Multiplying a number by its self is called squaring a number When using exponents, the second power of a whole number is called a perfect square too, For example, write 4 squared = 16, 7 squared = 49, and 265 = 70, 225 are all perfect squares.

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hmmmmm. idk?????????? 81 should be correct,i just checked.. hehe

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13y ago
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Q: What is a perfect square number?
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