3/(x+3)(x-15)

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Solution for 3/(x+3)(x-15) equation: 


D( x )

x+3 = 0

x+3 = 0

x+3 = 0

x+3 = 0 // - 3

x = -3

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

(3/(x+3))*(x-15) = 0

(3*(x-15))/(x+3) = 0

x-15 = 0 // + 15

x = 15

x = 15

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