# SOLUTION: a^-2-2a^-1+5=0 I have tried this problem several times and am stuck. I can tell you I put the negatives on the bottom and came up with a common demoninator but I still can not

Algebra ->  Algebra  -> Exponents-negative-and-fractional -> SOLUTION: a^-2-2a^-1+5=0 I have tried this problem several times and am stuck. I can tell you I put the negatives on the bottom and came up with a common demoninator but I still can not       Log On

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 Algebra: Negative and Fractional exponents Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Exponents-negative-and-fractional Question 539739: a^-2-2a^-1+5=0 I have tried this problem several times and am stuck. I can tell you I put the negatives on the bottom and came up with a common demoninator but I still can not come up with the correct answer. Answer by mananth(12270)   (Show Source): You can put this solution on YOUR website! LCD = a^2 Multiply equation by LCD Find the roots of the equation by quadratic formula a= 5 ,b= -2 ,c= 1 b^2-4ac= b^2-4ac= 4 - -20 b^2-4ac= -16 = 4i x1= (-(-2)+4i)/10 x1=0.2+0.4i x2=0.2-0.4i m.ananth@hotmail.ca