(3x-6)/(7x+14)*(4x+8)/(14x-28)

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Solution for (3x-6)/(7x+14)*(4x+8)/(14x-28) equation: 


D( x )

14*x-28 = 0

7*x+14 = 0

14*x-28 = 0

14*x-28 = 0

14*x-28 = 0 // + 28

14*x = 28 // : 14

x = 28/14

x = 2

7*x+14 = 0

7*x+14 = 0

7*x+14 = 0 // - 14

7*x = -14 // : 7

x = -14/7

x = -2

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

(((3*x-6)/(7*x+14))*(4*x+8))/(14*x-28) = 0

((3*x-6)*(4*x+8))/((7*x+14)*(14*x-28)) = 0

( 3*x-6 )

3*x-6 = 0 // + 6

3*x = 6 // : 3

x = 6/3

x = 2

( 4*x+8 )

4*x+8 = 0 // - 8

4*x = -8 // : 4

x = -8/4

x = -2

x in { 2} 

x in { -2} 

x belongs to the empty set

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