Odpowiedź:
[tex]3 \sqrt{2 } \times 7 \sqrt{2} = (3 \times 7) \sqrt{(2 \times 2)} = 21 \sqrt{4 } [/tex]
[tex] \sqrt{5} \times \sqrt{15} = \sqrt{15 \times 5} = \sqrt{75} = 5 \sqrt{3} [/tex]
[tex] \sqrt{72} = 6 \sqrt{2} [/tex]
[tex] \sqrt[3]{ - 54} = - 3 \sqrt[3]{2} [/tex]
[tex] \frac{ \sqrt{5} }{ \sqrt{125} } = \frac{1}{ \sqrt{25} } = \frac{1}{5} = 0.2[/tex]
[tex]2 \sqrt{5} + 6 \sqrt{5} = 8 \sqrt{5} [/tex]
[tex] \sqrt{50} + \sqrt{72} = 5 \sqrt{2} + 6 \sqrt{2} = 11 \sqrt{2} [/tex]
[tex] \sqrt{63} = 3 \sqrt{7} [/tex]
