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Oliga [24]
2 years ago
12

Simplify. Divide the radicals. √80 √20

Mathematics
1 answer:
Crazy boy [7]2 years ago
6 0

\cfrac{\sqrt{80}}{\sqrt{20}} ~~ \begin{cases} 80=2\cdot 2\cdot 2\cdot 2\cdot 5\\ \qquad 4\cdot 4\cdot 5\\ \qquad 4^2\cdot 5\\ 20=2\cdot 2\cdot 5\\ \qquad 2^2\cdot 5 \end{cases}\implies \cfrac{\sqrt{4^2\cdot 5}}{\sqrt{2^2\cdot 5}}\implies \cfrac{4\sqrt{5}}{2\sqrt{5}}\implies \cfrac{4}{2}\cdot \cfrac{\sqrt{5}}{\sqrt{5}}\implies 2

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