(7-7x)/(x^3+9x^2+8x)

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Solution for (7-7x)/(x^3+9x^2+8x) equation: 


D( x )

x^3+9*x^2+8*x = 0

x^3+9*x^2+8*x = 0

x^3+9*x^2+8*x = 0

x^3+9*x^2+8*x = 0

x*(x^2+9*x+8) = 0

x^2+9*x+8 = 0

DELTA = 9^2-(1*4*8)

DELTA = 49

DELTA > 0

x = (49^(1/2)-9)/(1*2) or x = (-49^(1/2)-9)/(1*2)

x = -1 or x = -8

x = 0

x = 0

x in (-oo:-8) U (-8:-1) U (-1:0) U (0:+oo)

(7-(7*x))/(x^3+9*x^2+8*x) = 0

(7-7*x)/(x^3+9*x^2+8*x) = 0

x^3+9*x^2+8*x = 0

x*(x^2+9*x+8) = 0

x^2+9*x+8 = 0

DELTA = 9^2-(1*4*8)

DELTA = 49

DELTA > 0

x = (49^(1/2)-9)/(1*2) or x = (-49^(1/2)-9)/(1*2)

x = -1 or x = -8

x*(x+8)*(x+1) = 0

(7-7*x)/(x*(x+8)*(x+1)) = 0

7-7*x = 0 // - 7

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

x = -7/(-7)

x = 1

x = 1

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