gimana minta tolong caranya nomor 29 makasih

[tex]2 \sqrt{5} ( \sqrt{5} - \sqrt{2} ) \\ = > (2 \sqrt{5} \times \sqrt{5} ) - (2 \sqrt{5} \times \sqrt{2} \\ = > (2 \times 5) - (2 \sqrt{10} ) \\ = > 10 - 2 \sqrt{10} [/tex]
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