Mathematics, 08.09.2019 03:20 kovacscsilla55owjvhn
^3√81 ^3√-64simplify each cube root expression. describe the simplified form of the expression as rational or irrational. in your final answer, include all of your work.
Answers: 1
![\large\boxed{\sqrt[3]{81}=3\sqrt[3]3-irrational}\\\boxed{\sqrt[3]{-64}=-4-rational}](/tpl/images/0225/3813/04f0b.png)
![\sqrt[3]{81}=\sqrt[3]{(27)(3)}\qquad\text{use}\ \sqrt[n]{ab}=\sqrt[n]{a}\cdot\sqrt[n]{b}\\\\=\sqrt[3]{27}\cdot\sqrt[3]3=3\sqrt[3]3\qquad/\sqrt[3]{27}=3\ \text{because}\ 3^3=27/\\\\\sqrt[3]{-64}=-4\ \text{because}\ (-4)^3=-64](/tpl/images/0225/3813/75146.png)
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^3√81 ^3√-64simplify each cube root expression. describe the simplified form of the expression as ra...
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