-1/2x^2-7x-8.5=3.5

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Solution for -1/2x^2-7x-8.5=3.5 equation: 


x in (-oo:+oo)

(-1/2)*x^2-(7*x)-8.5 = 3.5 // - 3.5

(-1/2)*x^2-(7*x)-8.5-3.5 = 0

(-1/2)*x^2-7*x-8.5-3.5 = 0

-1/2*x^2-7*x-12 = 0

DELTA = (-7)^2-(-12*(-1/2)*4)

DELTA = 25

DELTA > 0

x = (25^(1/2)+7)/(-1/2*2) or x = (7-25^(1/2))/(-1/2*2)

x = -12 or x = -2

x in { -12, -2 }

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