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Need help with an algebra question i dont get?

label Algebra
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If a and b are the solutions of 

84/t+27 + t 21/9 =1, complete the sum a+b

Feb 13th, 2015

84/t+27+t21/9=1

84+27t+21/9t^2=t

21/9t^2+26t+84=0

7t^2+78t+252=0

D<0 so no solutions exist


Feb 13th, 2015

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Feb 13th, 2015
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Feb 13th, 2015
Jun 27th, 2017
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