Respuesta :

[tex]\sqrt{180}-\sqrt{125}\\\\\sqrt{180}=\sqrt{36\cdot5}=\sqrt{36}\cdot\sqrt5=6\sqrt5\\\sqrt{125}=\sqrt{25\cdot5}=\sqrt{25}\cdot\sqrt5=5\sqrt5\\\\\sqrt{180}-\sqrt{125}=6\sqrt5-5\sqrt5=(6-5)\sqrt5=\sqrt5[/tex]