Salutare!
[tex]\displaystyle{5 \sqrt{2}= \sqrt{5^{2} \times 2} = \sqrt {25 \times 2} = \sqrt {50} }[/tex]
Reguli de calcul cu radicali:
- [tex]\sqrt{a^{2}}=a[/tex], ∀ a ≥ 0
- [tex]\sqrt{a}[/tex] × [tex]\sqrt{b}[/tex] = [tex]\sqrt{a \times b}[/tex], ∀ a, b ≥ 0
- a × [tex]\sqrt{b}[/tex] = [tex]\sqrt{a^{2}}[/tex] × [tex]\sqrt{b}[/tex] = [tex]\sqrt{a^{2} \times b}}[/tex]
- Lumberjack25
