Odpowiedź:
[tex] a) \: \: \sqrt{5} (3 - \sqrt{5} ) = 3 \sqrt{5} - 5[/tex]
[tex]b) \: \: \sqrt{2} (5 \sqrt{2} - 3) = 10 - 3 \sqrt{2} [/tex]
[tex]c) \: \: - \sqrt{3} (2 \sqrt{3} + 5) = - 6 - 5 \sqrt{3} [/tex]
[tex]d) \: \: 2 \sqrt{7} (4 + \sqrt{7} ) = 8 \sqrt{7} + 14[/tex]
[tex]e) \: \: 3 \sqrt{5} (3 - 2 \sqrt{5} ) = 9 \sqrt{5 } - 30[/tex]
[tex] - 4 \sqrt{2} (3 \sqrt{2} - 1) = - 24 + 4 \sqrt{2} = 4 \sqrt{2} - 24[/tex]
