Question

Упростите выражение #7

Answer 1

$(frac{sqrt{a} }{a-b}- frac{1}{sqrt{a}+ sqrt{b} } ): frac{sqrt{a} }{b-a} =\(frac{sqrt{a} }{a-b}- frac{1(sqrt{a}-sqrt{b})} {(sqrt{a}+ sqrt{b})(sqrt{a}- sqrt{b}) } ):(- frac{sqrt{a} }{a-b})=\(frac{sqrt{a}-sqrt{a}+sqrt{b}}{a-b})*(-frac{a-b}{sqrt{a} } )=\-frac{sqrt{b} }{a-b}*frac{a-b}{sqrt{a} } =\-frac{sqrt{b} }{sqrt{a}}$