kawan tolong bantu jawab ya jangan lupa pakai cara... ok(21-23)

[tex]21. \: \sqrt{3} + \sqrt{27} + \sqrt{48} \\ = \: \sqrt{3} + 3 \sqrt{3} + 4 \sqrt{3} \\ = \: 1 \sqrt{3} + 3 \sqrt{3} + 4 \sqrt{3} \\ = \: (1 + 3 + 4) \sqrt{3} \\ = \: 8 \sqrt{3} \\ 22. \: (3 \sqrt{2} + \sqrt{7} )^{2} \\ = \: (3 \sqrt{2} ) ^{2} + 2 \times 3 \sqrt{2} \sqrt{7} + \sqrt{7}^{2} \\ = \: 9 \times 2 + 6 \sqrt{14} + 7 \\ = \: 18 + 6 \sqrt{14} + 7 \\ = \: 25 + 6 \sqrt{14} [/tex]
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