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You probably mean what is the simplest form of sqrt 45....?

45=3x3x5

3x3 is a square number, so

sqrt45=sqrt(9*5)=sqrt(9)*sqrt(5)=3*sqrt(5)

* indicates multiplication

sqrt indicates a square root (also known as a surd (in the english national curriculum) or a radical...apparently

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13y ago

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Q: What is the simplified radical of 45?
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