bentuk dari 5 per 4 kurang akar 2

Mapel : Matematika

Kelas : 6, 7

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[tex] = \frac{5}{4 - \sqrt{2} } \times \frac{4 + \sqrt{2} }{4 + \sqrt{2} } \\ \\ = \frac{20 + 5 \sqrt{2} }{16 - 2} \\ \\ = \frac{20 + 5 \sqrt{2} }{14} \\ \\ = \frac{10}{7} + \frac{5}{14} \sqrt{2} [/tex]