3 akar 125 dikali 2 akar 45 adalah

Ans:
[tex]=3\sqrt{125}\;\times\;2\sqrt{45}\\\\ =3\sqrt{25\cdot5}\;\times\;2\sqrt{9\cdot5}\\\\ =(3\cdot5)\sqrt{5}\;\times\;(2\cdot3)\sqrt{5}\\\\ =15\sqrt{5}\;\times\;6\sqrt{5}\\\\\ =(15\times6)(\sqrt{5})^2\\\\ =(90)(5)\\\\ =\bf450[/tex]