[tex] \frac{8 \sqrt{5} }{ \sqrt{7 + \sqrt{2 } } } = [/tex]tolong bantu jawab dirasionalkan bilangnya
Answer (1)
Penyelesaian[tex]8\sqrt{5} \times (\sqrt{7}-\sqrt{2}) = 8\sqrt{5} \cdot \sqrt{7} - 8\sqrt{5} \cdot \sqrt{2}[/tex] [tex]= 8\sqrt{35} - 8\sqrt{10}[/tex][tex](\sqrt{7}+\sqrt{2})(\sqrt{7}-\sqrt{2}) = (\sqrt{7})^2 - (\sqrt{2})^2[/tex][tex]= 7 - 2[/tex][tex]= 5[/tex]bentuk rasional =[tex]\frac{8\sqrt{35} - 8\sqrt{10}}{5}[/tex]
