The value of \(\frac{{\sqrt {80} - \sqrt {112} }}{{\sqrt {45} - \sqrt {63} }} = ?\)
3/4
\(1\frac{3}{4}\)
\(1\frac{1}{3}\)
\(1\frac{7}{9}\)
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2
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3
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5
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6
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7
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8
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9
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10
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