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Answer bta do yaro m usee follow karunga

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\frac{5 + 2 \sqrt{3} }{7 + 4 \sqrt{3} } = a - b \sqrt{3} \\ \frac{5 + 2 \sqrt{3} }{7 + 4 \sqrt{3} } \times \frac{7 - 4 \sqrt{3} }{7 - 4 \sqrt{3} } = a - b \sqrt{3} \\ \frac{35 - 20 \sqrt{3} + 14 \sqrt{3} - 24 }{7 {}^{2} - 4 {}^{2} \times 3} = a - b \sqrt{3} \\ \frac{11 - 6 \sqrt{3} }{49 - 48} = a - b \sqrt{3} \\ 11 - 6 \sqrt{3} = a - b \sqrt{3} \\ thus \: a = 11 \\ and \: \: b = 6


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