Obliczenia
[tex]\sqrt{125}=\sqrt{25\cdot5}=\sqrt{5^2\cdot5}=5\sqrt5\\\\\sqrt[3]{40}=\sqrt[3]{8\cdot5}=\sqrt[3]{2^3\cdot5}=2\sqrt[3]5\\\\\sqrt[3]{81}=\sqrt[3]{27\cdot3}=\sqrt[3]{3^3\cdot3}=3\sqrt[3]3\\\\\sqrt[3]{128}=\sqrt[3]{64\cdot2}=\sqrt[3]{4^3\cdot2}=4\sqrt[3]2[/tex]
√125=√(25·5)=√25·√5=5·√5=5√5
∛40=∛(8·5)=∛8·∛5=2·∛5=2∛5
∛81=∛(27·3)=∛27·∛3=3·∛3=3∛3
∛128=∛(64·2)=∛64·∛2=4·∛2=4∛2
