(2x^2+6x)/(1-x)

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


D( x )

1-x = 0

1-x = 0

1-x = 0

1-x = 0 // - 1

-x = -1 // * -1

x = 1

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

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

2*x^2+6*x = 0

2*x*(x+3) = 0

x+3 = 0 // - 3

x = -3

2*x*(x+3) = 0

(2*x*(x+3))/(1-x) = 0

( 2*x )

2*x = 0 // : 2

x = 0

( x+3 )

x+3 = 0 // - 3

x = -3

x in { 0, -3 }

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