(7x+4)/1*(x+1)(7x-4)/(7x+4)(7x-4)

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Solution for (7x+4)/1*(x+1)(7x-4)/(7x+4)(7x-4) equation: 


D( x )

7*x+4 = 0

7*x+4 = 0

7*x+4 = 0

7*x+4 = 0 // - 4

7*x = -4 // : 7

x = -4/7

x in (-oo:-4/7) U (-4/7:+oo)

((((7*x+4)/1)*(x+1)*(7*x-4))/(7*x+4))*(7*x-4) = 0

(((7*x+4)*(x+1)*(7*x-4))/(7*x+4))*(7*x-4) = 0

(x+1)*(7*x-4)^2 = 0

( 7*x-4 )

7*x-4 = 0 // + 4

7*x = 4 // : 7

x = 4/7

( x+1 )

x+1 = 0 // - 1

x = -1

x in { 4/7, 4/7, -1 }

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