4x^2-1/2x-1=9

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Solution for 4x^2-1/2x-1=9 equation: 


x in (-oo:+oo)

4*x^2-((1/2)*x)-1 = 9 // - 9

4*x^2-((1/2)*x)-9-1 = 0

4*x^2+(-1/2)*x-9-1 = 0

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

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

DELTA = 641/4

DELTA > 0

x = ((641/4)^(1/2)+1/2)/(2*4) or x = (1/2-(641/4)^(1/2))/(2*4)

x = ((641/4)^(1/2)+1/2)/8 or x = (1/2-(641/4)^(1/2))/8

x in { (1/2-(641/4)^(1/2))/8, ((641/4)^(1/2)+1/2)/8 }

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