Question

номер 3.12 вычислите

Answer 1

$3\cdot \sqrt{11}\cdot \sqrt{44}=3\cdot \sqrt{11\cdot (4\cdot 11)}=3\cdot \sqrt{11^2\cdot 2^2}=3\cdot 11\cdot 2=66\\\\2\cdot \sqrt{3^4}\cdot \sqrt{7^2}=2\cdot 3^2\cdot 7=3\cdot 9\cdot 7=126\\\\\sqrt{13^2\cdot 2^4}=13\cdot 2^2=13\cdot 4=52\\\\0,2\cdot \sqrt\frac{4}{25}}=0,2\cdot \sqrt{\frac{2^2}{5^2}}=0,2\cdot \frac{2}{5}=\frac{0,4}{5}=0,08$