Scoate factorul de sub radical al nr. 1331. URGENT

Răspuns :

1331 | 11
121 | 11
11 | 11
1 |

[tex]\Rightarrow \sqrt {1331} = \sqrt {11^3} = \sqrt {11^2\cdot 11} = \\ \\ = \sqrt {11^2} \cdot \sqrt{11 } = 11\sqrt{11}[/tex]
1331=11×121
√1331=√(11×121)=11√11
121=11×11