(3a+6)/(2a+4)

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Solution for (3a+6)/(2a+4) equation: 


D( a )

2*a+4 = 0

2*a+4 = 0

2*a+4 = 0

2*a+4 = 0 // - 4

2*a = -4 // : 2

a = -4/2

a = -2

a in (-oo:-2) U (-2:+oo)

(3*a+6)/(2*a+4) = 0

3*a+6 = 0 // - 6

3*a = -6 // : 3

a = -6/3

a = -2

a in { -2} 

a belongs to the empty set

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