Question

Alguma alma caridosa?

Answer 1

racionalizar

$\frac{2 \sqrt{3} }{ \sqrt{5}- \sqrt{3} } = \\ \\ \frac{2 \sqrt{3}( \sqrt{5}+ \sqrt{3}) }{( \sqrt5- \sqrt3)( \sqrt{5}+ \sqrt{3} ) } }} } = \\ \\ \frac{2 \sqrt{3}( \sqrt{5} + \sqrt{3}) }{ \sqrt{5^2}- \sqrt{3^2} } = \\ \\ \frac{2 \sqrt{3}( \sqrt{5}+ \sqrt{3} ) }{5-3} = \\ \\ \frac{\not2 \sqrt{3}( \sqrt{5}+ \sqrt{3} ) }{\not2} = \\ \\ \sqrt{15} + \sqrt{3^2} = \\ \\ \sqrt{15} +3 \\ \\ letra~~C$