Hasil dari akar 128 kuarng 2 akar 18

[tex]\sqrt{2 \times 8^{2}} - 2 \sqrt{2 \times 3^{2}} \\ 8 \sqrt{2} - 2(3 \sqrt{2}) \\ 8 \sqrt{2} - 6 \sqrt{2} \\ 2 \sqrt{2}[/tex]

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