(7x^2-5x^2-7x)/(7x-5)

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Solution for (7x^2-5x^2-7x)/(7x-5) equation: 


D( x )

7*x-5 = 0

7*x-5 = 0

7*x-5 = 0

7*x-5 = 0 // + 5

7*x = 5 // : 7

x = 5/7

x in (-oo:5/7) U (5/7:+oo)

(7*x^2-(5*x^2)-(7*x))/(7*x-5) = 0

(7*x^2-5*x^2-7*x)/(7*x-5) = 0

(2*x^2-7*x)/(7*x-5) = 0

2*x^2-7*x = 0

x*(2*x-7) = 0

2*x-7 = 0 // + 7

2*x = 7 // : 2

x = 7/2

x*(x-7/2) = 0

(x*(x-7/2))/(7*x-5) = 0

( x-7/2 )

x-7/2 = 0 // + 7/2

x = 7/2

( x )

x = 0

x in { 7/2, 0 }

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