a)
[tex] \sqrt{52} \div \sqrt{13} = \sqrt{4} = 2[/tex]
b)
[tex]\sqrt{2} ( \sqrt{18} + \sqrt{50} ) = \sqrt{2} ( \sqrt{9 \times 2} + \sqrt{25 \times 2} ) = \sqrt{2} (3 \sqrt{2} + 5 \sqrt{2} ) = \sqrt{2}\times8\sqrt{2} = 16\sqrt{2}[/tex]
c)
[tex] \sqrt{5} \times \sqrt{125} = \sqrt{5} \times \sqrt{25 \times 5} = \sqrt{5} \times 5 \sqrt{5} = 5 \sqrt{25} = 5 \times 5 = 25[/tex]
Myślę że pomogłem ;)
