Question

Помогите пожалуйста,Срочно

Answer 1

$1. \\ 2 \sqrt{ 5\dfrac{1}{2} }+ \dfrac{1}{3} \sqrt{99} -2 \sqrt{2 \frac{3}{4} } = \\ \\ = \sqrt{11}+2* \dfrac{ \sqrt{11} }{ \sqrt{2} }-2* { \dfrac{ \sqrt{11} }{2} } = \\ \\ = \sqrt{22} + \sqrt{11}- \sqrt{11}= \\ \\ =\sqrt{22} \\ \\ 2. \\ \sqrt{0,9}+ \sqrt{14,4} - \sqrt{8,1} = \\ \\ = \sqrt{\dfrac{9}{10}}+ \sqrt{ \dfrac{144}{10} }- \sqrt{\dfrac{81}{10}} = \\ \\ = \dfrac{3 \sqrt{10} }{10} +\dfrac{6\sqrt{10}}{5}- \dfrac{9 \sqrt{10} }{10} = \\ \\ = \dfrac{6\sqrt{10}}{10}= \sqrt{3,6}$