Question

Помогите!!!! Пожалуйста

Answer 1

$\sqrt{324 } = 18 \\ \sqrt{63} \times \sqrt{7} = \sqrt{63 \times 7} = \sqrt{441} =21 \\ \sqrt{196 \div 4} = \sqrt{49} = 7 \\ \sqrt{245 \div 5} = \sqrt{49} = 7 \\ \sqrt{( { - 6})^{2} } = \sqrt{36} = 6$