(7-9x)/(x^3-2x^2-3x)

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


D( x )

x^3-(2*x^2)-(3*x) = 0

x^3-(2*x^2)-(3*x) = 0

x^3-(2*x^2)-(3*x) = 0

x^3-2*x^2-3*x = 0

x^3-2*x^2-3*x = 0

x*(x^2-2*x-3) = 0

x^2-2*x-3 = 0

DELTA = (-2)^2-(-3*1*4)

DELTA = 16

DELTA > 0

x = (16^(1/2)+2)/(1*2) or x = (2-16^(1/2))/(1*2)

x = 3 or x = -1

x = 0

x = 0

x in (-oo:-1) U (-1:0) U (0:3) U (3:+oo)

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

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

x^3-2*x^2-3*x = 0

x*(x^2-2*x-3) = 0

x^2-2*x-3 = 0

DELTA = (-2)^2-(-3*1*4)

DELTA = 16

DELTA > 0

x = (16^(1/2)+2)/(1*2) or x = (2-16^(1/2))/(1*2)

x = 3 or x = -1

x*(x+1)*(x-3) = 0

(7-9*x)/(x*(x+1)*(x-3)) = 0

7-9*x = 0 // - 7

-9*x = -7 // : -9

x = -7/(-9)

x = 7/9

x = 7/9

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