[tex] \sqrt{7} (1 - \sqrt{7} ) = [/tex] tolong jawab beserta caranya ya kak.. makasih..

[tex] \sqrt{7} (1 - \sqrt{7} ) \\ = (\sqrt{7} \times 1 - \sqrt{7} \times \sqrt{7 } ) \\ = \sqrt{7} - 7[/tex]
Semoga terbantu