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Rules of Exponents, Part 3: More advanced methods & finer points

In the final installment on the rules of exponents, we discuss some final techniques and get around to actually simplifying:

$$\frac{3x^{9}\sqrt{72x^{18}y^{9}}}{4x^{5}y^{7}\sqrt{50x^{21}z^{7}}}$$

Download the article here.

Interesting exponents question with cool trick

Rules of Exponents, Part 2: Roots