Помогите Пожалуйста!. Created by idrisovi073. algebra-ru

Ответ:Смотри решение на фото ниже

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rahlenko007

Объяснение:

$a) \sqrt{0,64} -\sqrt{0,04} =\sqrt{\frac{64}{100}}-\sqrt{\frac{4}{100} } =\frac{\sqrt{64} }{\sqrt{100}} -\frac{\sqrt{4}}{\sqrt{100}} =\frac{8}{10} -\frac{4}{10} =0,8-0,4=0,6$

$b)3*\sqrt{0,16}=3*\sqrt{\frac{16}{100} } =3*\frac{\sqrt{16}}{\sqrt{100} } =3*\frac{4}{10} =\frac{12}{10} =1,2$

$c)\sqrt{900} *\sqrt{100} =30*10=300$

$d)\sqrt{\frac{25}{64} } =\frac{\sqrt{25}}{\sqrt{64} } =\frac{5}{8}$

$e)\sqrt{56} *\sqrt{14} =\sqrt{56*14} =\sqrt{784} =28$

$f)2(\sqrt{3} )^2=2*3=6$

$g)3*\sqrt{\frac{4}{9} } +\sqrt{0,25} =3*\frac{\sqrt{4} }{\sqrt{9} } +\sqrt{\frac{25}{100} } =3*\frac{2 }{3 } +\frac{\sqrt{25}}{\sqrt{100} }=\frac{6}{3} +\frac{5}{10} =2 +\frac{1}{2} =2,5$

$h)\sqrt{0,0036} +\sqrt{25} =\sqrt{\frac{36}{10000} } +5=\frac{\sqrt{36} }{\sqrt{10000} } +5=\frac{6}{\sqrt{100*100} } +5=\frac{6}{\sqrt{100}*\sqrt{ 100} } +5=\\\\=\frac{6}{10*10} +5=\frac{6}{100} +5=0,06+5=5,06$

$i)3*\sqrt{1,21} =3*\sqrt{\frac{121}{100} } =3*\frac{\sqrt{121} }{\sqrt{100} } =3*\frac{11}{10} =\frac{33}{10} =3,3$

$j)\sqrt{400} *\sqrt{81} =\sqrt{4*100} *9=\sqrt{4} *\sqrt{100}*9=2*10*9=180$

$k)\sqrt{\frac{16}{25} } =\frac{\sqrt{16} }{\sqrt{25} } =\frac{4}{5}$

$l)\sqrt{28} *\sqrt{63} =\sqrt{4*7} *\sqrt{9*7} =\sqrt{4} *\sqrt{7} *\sqrt{9} *\sqrt{7} =2*3*(\sqrt{7}) ^2=6*7=42$

$m)4(\sqrt{5} )^2=4*5=20$

$n)7*\sqrt{\frac{4}{49} }+\sqrt{0,64} =7*\frac{\sqrt{4}}{\sqrt{49} }+\sqrt{\frac{64}{100} } =7*\frac{2}{7 }+\frac{\sqrt{64}}{\sqrt{100} } }=\frac{14}{7} +\frac{8}{10} =2+0,8=2,8$

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