Question

Решите выделенное пж

Answer 1

$\sqrt{243 } = \sqrt{81 \times 3} = 9 \sqrt{3}$


$- 0.4 \sqrt{500} = - 0.4 \sqrt{100 \times 5} = -0.4 \times 10 \sqrt{5} = - 4 \sqrt{5}$


$\frac{1}{3} \sqrt{45} = \frac{1}{3} \sqrt{9 \times 5} = \frac{1}{3} \times 3 \sqrt{5} = \sqrt{5}$