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6528;45
y = 0.025-0.5*x^2-0.3*x;-0.5;-0.3;0.025
-(((-0.3)^2-(-0.5*0.025*4))/(-0.5*4))
-(-0.3/(-0.5*2))
0.025-(0.5*0^2)-(0*0.3)
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