Question

Cat e 5 radical din 2?

Answer 1

Salutare!

$\displaystyle{5 \sqrt{2}= \sqrt{5^{2} \times 2} = \sqrt {25 \times 2} = \sqrt {50} }$

Reguli de calcul cu radicali:

1. $\sqrt{a^{2}}=a$, ∀ a ≥ 0
2. $\sqrt{a}$ × $\sqrt{b}$ = $\sqrt{a \times b}$, ∀ a, b ≥ 0
3. a × $\sqrt{b}$ = $\sqrt{a^{2}}$ × $\sqrt{b}$ = $\sqrt{a^{2} \times b}}$

- Lumberjack25