[tex](\sqrt{ 3}- \sqrt{2})( \sqrt{3}-2 \sqrt{2})=\sqrt{3}*\sqrt{3}-\sqrt{3}*2\sqrt{2}-\sqrt{2}*\sqrt{3}+\sqrt{2}*2\sqrt{2}=\\\\=3-2\sqrt{3*2}-\sqrt{2*3}+2*2=3-2\sqrt{6}-\sqrt{6}+4=7-3\sqrt{6}\\\\1.wymnazamy\\2.\ stosujemy\ wzor:\\\\\sqrt{a}*\sqrt{a}=a\\\\\sqrt{a}*\sqrt{b}=\sqrt{a*b}[/tex]
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[tex](\sqrt{ 3}- \sqrt{2})( \sqrt{3}-2 \sqrt{2})=\sqrt{3}*\sqrt{3}-\sqrt{3}*2\sqrt{2}-\sqrt{2}*\sqrt{3}+\sqrt{2}*2\sqrt{2}=\\\\=3-2\sqrt{3*2}-\sqrt{2*3}+2*2=3-2\sqrt{6}-\sqrt{6}+4=7-3\sqrt{6}\\\\1.wymnazamy\\2.\ stosujemy\ wzor:\\\\\sqrt{a}*\sqrt{a}=a\\\\\sqrt{a}*\sqrt{b}=\sqrt{a*b}[/tex]