September 2018 1 56 Report

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b)2y³+3y²-5y+6 , y=-½

d)a²-a+1/ a²+a+1 , a=0,5

f)c²+1/1-c² , c=-3¹/₃

h)3x²-2xy-4y²/2x³y²-1 , x=-⅔ y=1,5


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