Question

Срочно!Алгебра 8 класс! Нужно пошаговое решение )

Answer 1

$1.\sqrt{ 36 \times 49 } = \sqrt{1764} = 42$

$2.\sqrt{ 4.9 } \times \sqrt{ 810 } = \sqrt{4.9}\times 9\sqrt{10} = \sqrt{49}\times 9 = 7 \times 9 = 63$

$3.\sqrt{ \frac{ 80 }{ 45 } } =\sqrt{\frac{16}{9}} = \frac{4}{3}$

Answer 2

$1)\sqrt{36*49}=\sqrt{6^{2}*7^{2}}=6*7=\boxed{42}\\\\2)\sqrt{4,9} *\sqrt{810}=\sqrt{4,9*10*81}=\sqrt{49*81}= \sqrt{7^{2}*9^{2}}=7*9=\boxed{63}\\\\3)\sqrt{\frac{80}{45} }=\sqrt{\frac{5*16}{5*9} }=\sqrt{\frac{16}{9}}=\sqrt{(\frac{4}{3})^{2}}=\boxed{\frac{4}{3}}$