Автор - augulhazieva

Помогите пожалуйста 2 и 6 номера.Срочно!!!!

Ответ

Автор - michindjeva

 frac{3}{5}  sqrt{20}  =  sqrt{ frac{9 times 20}{25} }  =  sqrt{ frac{36}{5} }  =   sqrt{7 frac{1}{5} }  \  frac{2}{3}  sqrt{12}  =  sqrt{ frac{4 times 12}{9} }  =  sqrt{ frac{16}{3} }  =  sqrt{5 frac{1}{3} }
А>В
 frac{16 - c}{ sqrt{c}  - 4}  =  frac{(4 -  sqrt{c} ) times (4 +  sqrt{c} )}{ - (4 -  sqrt{c}) }  =  - (4 +  sqrt{c)}

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