0=15x-1/2(10)x^2

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Solution for 0=15x-1/2(10)x^2 equation: 


x in (-oo:+oo)

0 = 15*x-(10*(1/2)*x^2) // - 15*x-(10*(1/2)*x^2)

10*(1/2)*x^2-(15*x)+0 = 0

10*(1/2)*x^2-15*x = 0

5*x^2-15*x = 0

DELTA = (-15)^2-(0*4*5)

DELTA = 225

DELTA > 0

x = (225^(1/2)+15)/(2*5) or x = (15-225^(1/2))/(2*5)

x = 3 or x = 0

x in { 0, 3 }

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