4x^3-21x^2-(62/4)x

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Solution for 4x^3-21x^2-(62/4)x equation: 


x in (-oo:+oo)

4*x^3-(21*x^2)-((62/4)*x) = 0

4*x^3-21*x^2+(-31/2)*x = 0

4*x^3-21*x^2-31/2*x = 0

x*(4*x^2-21*x-31/2) = 0

4*x^2-21*x-31/2 = 0

DELTA = (-21)^2-(-31/2*4*4)

DELTA = 689

DELTA > 0

x = (689^(1/2)+21)/(2*4) or x = (21-689^(1/2))/(2*4)

x = (689^(1/2)+21)/8 or x = (21-689^(1/2))/8

x = 0

x = 0

x in { (21-689^(1/2))/8, (689^(1/2)+21)/8, 0 }

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