Question

(√7+2√6+√5)/(√30+6+√35+√42)

Answer 1

(7+6+6+5)/(5*6+6*6+5*7+6*7)

下面这个式子=6*(5+6)+7*(5+6)

=(5+6)(6+7)

即[(5+6)+(6+7)]/(5+6)(6+7)=1/(5+6)+1/(6+7)

都没带根号,弄成这样行不?