1/2y^2-9/2y-11

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Solution for 1/2y^2-9/2y-11 equation: 


y in (-oo:+oo)

(1/2)*y^2-((9/2)*y)-11 = 0

(1/2)*y^2+(-9/2)*y-11 = 0

1/2*y^2-9/2*y-11 = 0

DELTA = (-9/2)^2-(-11*1/2*4)

DELTA = 169/4

DELTA > 0

y = ((169/4)^(1/2)+9/2)/(1/2*2) or y = (9/2-(169/4)^(1/2))/(1/2*2)

y = 11 or y = -2

y in { -2, 11 }

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