Aufgabe

$(3 + \sqrt{5})(3-\sqrt{5})$

$(\sqrt{8} - \sqrt{3})(\sqrt{8} + \sqrt{3})$

$(\sqrt{2} + \sqrt{7})(\sqrt{2} - \sqrt{7})$

$(\sqrt{12} + 3)(\sqrt{12} - 3)$

$(\sqrt{x^3} - \sqrt{2y})(\sqrt{x^3} + \sqrt{2y})$

$(\sqrt{5x^5} + \sqrt{2})(\sqrt{5x^5} - \sqrt{2})$