1/2x^2+2x-40=0

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Solution for 1/2x^2+2x-40=0 equation: 


x in (-oo:+oo)

(1/2)*x^2+2*x-40 = 0

1/2*x^2+2*x-40 = 0

DELTA = 2^2-(-40*1/2*4)

DELTA = 84

DELTA > 0

x = (84^(1/2)-2)/(1/2*2) or x = (-84^(1/2)-2)/(1/2*2)

x = 2*21^(1/2)-2 or x = -2*21^(1/2)-2

x in { -2*21^(1/2)-2, 2*21^(1/2)-2 }

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