(3x-x^2)/(x+3)^2

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


D( x )

(x+3)^2 = 0

(x+3)^2 = 0

(x+3)^2 = 0

x+3 = 0 // - 3

x = -3

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

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

3*x-x^2 = 0

x*(3-x) = 0

3-x = 0 // - 3

-x = -3 // * -1

x = 3

x*(x-3) = 0

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

( x-3 )

x-3 = 0 // + 3

x = 3

( x )

x = 0

x in { 3, 0 }

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