((6x+6)/7)*(14/(x^2-1))

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Solution for ((6x+6)/7)*(14/(x^2-1)) equation: 


D( x )

x^2-1 = 0

x^2-1 = 0

x^2-1 = 0

1*x^2 = 1 // : 1

x^2 = 1

x^2 = 1 // ^ 1/2

abs(x) = 1

x = 1 or x = -1

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

((6*x+6)/7)*(14/(x^2-1)) = 0

(14*(6*x+6))/(7*(x^2-1)) = 0

6*x+6 = 0 // - 6

6*x = -6 // : 6

x = -6/6

x = -1

x in { -1} 

x belongs to the empty set

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