Автор - sonyaborozdina

ПОМОГИТЕ РЕШИТЬ!
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Ответ

Проверено экспертом

Автор - Universalka

1)(sqrt{11}-sqrt{3})(sqrt{11}+sqrt{3})=(sqrt{11})^{2}-(sqrt{3} )^{2}=11-3=8\\2)(sqrt{24}-sqrt{6})*sqrt{6}=(sqrt{4*6}-sqrt{6})*sqrt{6}=(2sqrt{6}-sqrt{6})*sqrt{6}=sqrt{6}*sqrt{6}=6\\3)frac{39}{(2sqrt{13})^{2}}=frac{39}{2^{2}*(sqrt{13})^{2}} =frac{39}{4*13}=frac{3}{4}=0,75

4)frac{4}{5}sqrt{5}*sqrt{45}=frac{4}{5}sqrt{5}*sqrt{9*5}=frac{4}{5}sqrt{5}*3sqrt{5} =frac{4*3*5}{5} =12\\5)frac{sqrt{162} }{sqrt{2}}=sqrt{frac{162}{2}}=sqrt{81}=sqrt{9^{2}}=9\\6)sqrt{10}*sqrt{2,5}=sqrt{10*2,5}=sqrt{25}=sqrt{5^{2}}=5

6)frac{sqrt{288} }{3sqrt{8}}=frac{sqrt{144*2}}{3*sqrt{4*2}}=frac{12sqrt{2}}{3*2sqrt{2}}=frac{12sqrt{2}}{6sqrt{2}}=2\\7)sqrt{4^{2}*3^{4}} =sqrt{4^{2}*(3^{2})^{2}}=4*3^{2}=4*9=36\\8)sqrt{610^{2}-448^{2}} =sqrt{(610-448)(610+448)}=sqrt{162*1058}=sqrt{81*2*529*2}=sqrt{9^{2}*2^{2}*23^{2}} =9*2*23=414

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