7x/x+3-3x+x/9-x^2

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Solution for 7x/x+3-3x+x/9-x^2 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

x/9-x^2-(3*x)+(7*x)/x+3 = 0

x/9-x^2-3*x+(7*x)/x+3 = 0

10-x^2-26/9*x = 0

DELTA = (-26/9)^2-(-1*4*10)

DELTA = 3916/81

DELTA > 0

x = ((3916/81)^(1/2)+26/9)/(-1*2) or x = (26/9-(3916/81)^(1/2))/(-1*2)

x = ((3916/81)^(1/2)+26/9)/(-2) or x = (26/9-(3916/81)^(1/2))/(-2)

x in { ((3916/81)^(1/2)+26/9)/(-2), (26/9-(3916/81)^(1/2))/(-2) }

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