Question

упростить:$frac{3}{ sqrt{5} - sqrt{2} } + frac{5}{ sqrt{7} + sqrt{2} }$

Answer 1

$frac{3*( sqrt{5}+ sqrt{2}) }{( sqrt{5} - sqrt{2})*( sqrt{5}+ sqrt{2} ) } + frac{5*( sqrt{7} - sqrt{2} )}{( sqrt{7}+ sqrt{2} )*( sqrt{7} - sqrt{2} ) } = frac{3*( sqrt{5}+ sqrt{2} ) }{5-2} + frac{5*( sqrt{7}- sqrt{2} ) }{7-2}$

$= sqrt{5} + sqrt{2} + sqrt{7} - sqrt{2} = sqrt{5} + sqrt{7}$

Answer 2

спасибо большое :)