(1) (3−2)2=3−26+2=5−26(\sqrt{3}-\sqrt{2})^2 = 3 - 2\sqrt{6} + 2 = 5 - 2\sqrt{6}(3−2)2=3−26+2=5−26 (2) (22+5)2=8+410+5=13+410(2\sqrt{2}+\sqrt{5})^2 = 8 + 4\sqrt{10} + 5 = 13 + 4\sqrt{10}(22+5)2=8+410+5=13+410 (3) (7+2)(7−2)=7−2=5(\sqrt{7}+\sqrt{2})(\sqrt{7}-\sqrt{2}) = 7 - 2 = 5(7+2)(7−2)=7−2=5 (4) (15+3)(60−12)=(15+3)(215−23)=30−6=24(\sqrt{15}+\sqrt{3})(\sqrt{60}-\sqrt{12}) = (\sqrt{15}+\sqrt{3})(2\sqrt{15}-2\sqrt{3}) = 30 - 6 = 24(15+3)(60−12)=(15+3)(215−23)=30−6=24