(7x^2-4x+28)/(x^2-7x)=28/(x^2-7x)

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Solution for (7x^2-4x+28)/(x^2-7x)=28/(x^2-7x) equation:


D( x )

x^2-(7*x) = 0

x^2-(7*x) = 0

x^2-(7*x) = 0

x^2-7*x = 0

x^2-7*x = 0

DELTA = (-7)^2-(0*1*4)

DELTA = 49

DELTA > 0

x = (49^(1/2)+7)/(1*2) or x = (7-49^(1/2))/(1*2)

x = 7 or x = 0

x in (-oo:0) U (0:7) U (7:+oo)

(7*x^2-(4*x)+28)/(x^2-(7*x)) = 28/(x^2-(7*x)) // - 28/(x^2-(7*x))

(7*x^2-(4*x)+28)/(x^2-(7*x))-(28/(x^2-(7*x))) = 0

(7*x^2-4*x+28)/(x^2-7*x)-28*(x^2-7*x)^-1 = 0

(7*x^2-4*x+28)/(x^2-7*x)-28/(x^2-7*x) = 0

x^2-7*x = 0

x^2-7*x = 0

x*(x-7) = 0

x-7 = 0 // + 7

x = 7

x*(x-7) = 0

(7*x^2-4*x+28)/(x*(x-7))-28/(x*(x-7)) = 0

7*x^2-4*x-28+28 = 0

7*x^2-4*x = 0

7*x^2-4*x = 0

x*(7*x-4) = 0

7*x-4 = 0 // + 4

7*x = 4 // : 7

x = 4/7

x*(x-4/7) = 0

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

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

x*(x-4/7) = 0

( x-4/7 )

x-4/7 = 0 // + 4/7

x = 4/7

( x )

x = 0

x in { 0}

x = 4/7

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