Question

помогите плиз, срочно!!!!!!!

Answer 1

($( frac{1}{a+ sqrt{2} } - frac{ a^{2}+4 }{(a+ sqrt{2})( a^{2}- sqrt{2}a+2) } }): ( frac{ a^{2}- sqrt{2}a+2 }{2a}) ^{-1}= frac{ a^{2}- sqrt{2}a+2- a^{2}-4 }{(a+ sqrt{2})( a^{2}- sqrt{2}a+2) }: [tex] frac{2a}{ a^{2}- sqrt{2}a+2 }= frac{- sqrt{2}a-2 }{(a+ sqrt{2})( a^{2} - sqrt{2}a+2) }* frac{ a^{2}- sqrt{2}a+2 }{2a}= frac{- sqrt{2}(a+ sqrt{2}) }{(a+ sqrt{2})2a }=- frac{ sqrt{2} }{2a}$