dolphinstar4312 dolphinstar4312

20-11-2016
Mathematics

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5r^2-44r+120=-30+11r

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MohamedSharif MohamedSharif

20-11-2016

5r^2-44r+120=-30+11
5r^2=25r
25r-44r+120=-30+11
-19r+120=-19
-19r=-19-120
-19r=-139 the divide both sides by -19
r=-7.3

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