Witam, moglby ktos prosze rozwiazac to zadanie? z gory dziekuje

[latex][(6- sqrt{11} ) ^{ frac{1}{2} } -(6+ sqrt{11}) ^{ frac{1}{2} } ] ^{-2} = \ frac{1}{[(6- sqrt{11} ) ^{ frac{1}{2} } -(6+ sqrt{11}) ^{ frac{1}{2} } ] ^{2}} = \ \ frac{1}{(6- sqrt{11})-2[(6- sqrt{11})(6+ sqrt{11})] ^{ frac{1}{2} }+(6+ sqrt{11}) } = \ \ frac{1}{6- sqrt{11}-2(36-11) ^{ frac{1}{2} }+6+ sqrt{11} } = \ \ frac{1}{12-2( sqrt{25})} = frac{1}{12-10}= frac{1}{2} [/latex]