[tex]2\sqrt{50} - 2\sqrt{32} = 10\sqrt{2} - 8\sqrt{2} = 2\sqrt{2}[/tex]
Odpowiedź. C
x = [tex]5 - 3\sqrt{7}[/tex]
y = [tex]4 + 2\sqrt{7}[/tex]
x - y = [tex]5 - 3\sqrt{7} - 4 + 2\sqrt{7} = 1\sqrt{7}[/tex]
Odpowiedź. A
[tex]5\sqrt{3} = \sqrt{(5^2-3)} = \sqrt{75}[/tex]
[tex]4\sqrt{7} = \sqrt{(4^2*7)} = \sqrt{112}[/tex]
[tex]8\sqrt{2} = \sqrt{(8^2*2)} = \sqrt{128}[/tex]
[tex]3\sqrt{11} = \sqrt{(3^2*11)} = \sqrt{199}[/tex]
Odpowiedź. A
Odpowiedź D
