Question

Racionalize o denominador da fração v12/v7

Answer 1

√12/√7 → √4.√3/√7 → 2√3.√7/7 → 2√21/7

Answer 2

       $\frac{ \sqrt{12} }{ \sqrt{7} } * \frac{ \sqrt{7} }{ \sqrt{7} }= \frac{ \sqrt{84} }{ (\sqrt{7} )^2} = \frac{ \sqrt{2^2.3.7} }{7} = \frac{2 \sqrt{21} }{7} = \frac{2}{7} \sqrt{21}$