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98;200
y = 2.54*x-0.014868*x^2-86.75;-0.014868;2.54;-86.75
-((2.54^2-(-86.75*(-0.014868)*4))/(-0.014868*4))
-(2.54/(-0.014868*2))
0*2.54-(0.014868*0^2)-86.75
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