-4/(x+1)(x^2-9)

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Solution for -4/(x+1)(x^2-9) equation: 


D( x )

x+1 = 0

x+1 = 0

x+1 = 0

x+1 = 0 // - 1

x = -1

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

(-4/(x+1))*(x^2-9) = 0

(-4*(x^2-9))/(x+1) = 0

1*x^2 = 9 // : 1

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

x in { 3, -3 }

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