-x+1/2+14x2-7x-1-4x2

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Solution for -x+1/2+14x2-7x-1-4x2 equation: 


x in (-oo:+oo)

14*x^2-(4*x^2)-x-(7*x)+1/2-1 = 0

14*x^2-4*x^2-x-7*x+1/2-1 = 0

10*x^2-8*x-1/2 = 0

DELTA = (-8)^2-(-1/2*4*10)

DELTA = 84

DELTA > 0

x = (84^(1/2)+8)/(2*10) or x = (8-84^(1/2))/(2*10)

x = (2*21^(1/2)+8)/20 or x = (8-2*21^(1/2))/20

x in { (8-2*21^(1/2))/20, (2*21^(1/2)+8)/20 }

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