1.

The value of $$\frac{{\sqrt {80}- \sqrt {112} }}{{\sqrt {45}- \sqrt {63} }} = ?$$

A. $\frac{3}{4}$$
B. $1\frac{3}{4}$$
C. $1\frac{1}{3}$$
D. $1\frac{7}{9}$$
Answer» D. $1\frac{7}{9}$$


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