Question

Sa se rationalizeze numitorii rapoartelor: -9 supra 2√3, 10 supra 3√5, 6 supra √18, 14 supra 5√7, 9√45, 18 supra √6, 21 supra√7, 15 supra √5, 9 supra√3, 2 supra √2 DAU FUNDA

Answer 1

$-\frac{9}{2 \sqrt{3} }=- \frac{9*2 \sqrt{3} }{(2 \sqrt{3} )^2} =- \frac{18 \sqrt{3} }{12}=- \frac{3 \sqrt{3} }{2} \\ \frac{10}{3 \sqrt{5} } = \frac{30 \sqrt{5} }{45} = \frac{2 \sqrt{5} }{3} \\ \frac{6}{ \sqrt{18} }= \frac{6 \sqrt{18} }{18} = \frac{ \sqrt{18} }{3}$