Odpowiedź :
[tex]\sqrt{3}(\sqrt{27}-\sqrt{12}) = \sqrt{3}\cdot\sqrt{27} - \sqrt{3}\cdot\sqrt{12} = \sqrt{3\cdot27}-\sqrt{3\cdot12}=\sqrt{81}-\sqrt{36}=\\\\=\sqrt{9^{2}}-\sqrt{6^{2}} = 9-6 = 3\\\\Odp. \ B.[/tex]
[tex]Zadanie\\\\\sqrt{3}\cdot(\sqrt{27} -\sqrt{12})=\sqrt{3\cdot27}-\sqrt{3\cdot12}=\sqrt{81}-\sqrt{36}=9-6=3\\\\Odp.\ B[/tex]