5 akar 2 kurang akar 72 tambah akar 32

[tex] = 5 \sqrt{2} - \sqrt{72} + \sqrt{32} \\ = 5 \sqrt{2} - \sqrt{36 \times 2} + \sqrt{16 \times 2} \\ = 5 \sqrt{2} - 6 \sqrt{2} + 4 \sqrt{2} \\ = 3 \sqrt{2} [/tex]


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