1/2x^2-15x

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Solution for 1/2x^2-15x equation: 


x in (-oo:+oo)

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

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

1/2*x^2-15*x = 0

DELTA = (-15)^2-(0*1/2*4)

DELTA = 225

DELTA > 0

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

x = 30 or x = 0

x in { 0, 30 }

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