Question

Se 72x = 9, então V343x será igual a?

Answer 1

$72x = 9\\x = \frac{9}{72}\\\sqrt{343x} = \sqrt{343*\frac{1}{8}} = \sqrt{\frac{343}{8}} = \frac{\sqrt{343}}{\sqrt{8} } = \frac{\sqrt{343}}{2\sqrt{2} } * \frac{\sqrt{2} }{\sqrt{2} } = \frac{\sqrt{343} * \sqrt{2} }{2\sqrt{2} * \sqrt{2} } = \frac{\sqrt{686} }{4}$