Rational Exponents | MathHelp.com

To simplify 81 to the ½, remember from our study of rational exponents that an exponent of ½ means that we take the square root of the base. In other words, 81 to the ½ means the same thing as the square root of 81. And the square root of 81 is 9. So 81 to the ½ is 9

[Halxmon]

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[wittawatburutrkhaeliso]

what sort of math editor do they use? or a tool used to create this the math equation?

[jocelyn]

How do you know that the square root of 81 is 9?