mohon dijawab yah beserta jalannya

[tex]1.) \: 2 \sqrt{3} (4 \sqrt{5} + \sqrt{7} ) \\ = (2 \sqrt{3} \times 4 \sqrt{5} ) + (2 \sqrt{3} \times \sqrt{7} ) \\ = 8 \sqrt{15} + 2 \sqrt{21} [/tex]
[tex]2.) \: \sqrt{50} + \sqrt{20} - \sqrt{5} \\ = \sqrt{25 \times 2} + \sqrt{4 \times 5} - \sqrt{5} \\ = 5 \sqrt{2} + 2 \sqrt{5} - \sqrt{5} \\ = 5 \sqrt{2} + \sqrt{5} [/tex]