[tex]22) \: \sqrt{125} \\ \sqrt{5 {}^{2 + 1} } \\ \sqrt{5 {}^{2} \times 5 {}^{1} } \\ \sqrt{5 {}^{2} } \sqrt{5} \\ 5 \sqrt{5} \\ 23) \: \sqrt{23.5} \\ 235 = \frac{235 \div 5}{10 \div 5} \\ = \frac{47}{2 } \\ \sqrt{ \frac{47}{2} } \\ \frac{ \sqrt{47} }{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } \\ \frac{ \sqrt{47} \sqrt{2} }{ \sqrt{2} \sqrt{2} } \\ = \frac{ \sqrt{94} }{2} [/tex]
