0=-y^2-7/2y

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Solution for 0=-y^2-7/2y equation: 


y in (-oo:+oo)

0 = (-y)^2-((7/2)*y) // - (-y)^2-((7/2)*y)

(7/2)*y-(-y)^2+0 = 0

(7/2)*y-y^2 = 0

7/2*y-y^2 = 0

DELTA = (7/2)^2-(-1*0*4)

DELTA = 49/4

DELTA > 0

y = ((49/4)^(1/2)-7/2)/(-1*2) or y = (-(49/4)^(1/2)-7/2)/(-1*2)

y = 0 or y = 7/2

y in { 0, 7/2 }

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