Question

Найдите значение выражения √392/√8

Answer 1

$\frac{ \sqrt{392} }{ \sqrt{8} } = \frac{ \sqrt{4 \times 98} }{ \sqrt{4 \times 2} } = \frac{2 \sqrt{98} }{2 \sqrt{2} } = \frac{ \sqrt{98} }{ \sqrt{2} } = \frac{ \sqrt{49 \times 2} }{ \sqrt{2} } = \frac{7 \sqrt{2} }{ \sqrt{2} } = 7$

Answer 2

√392/√8=√(392/8)=√49=7