((7-x)/(7+x))/(7x/x^2-49)=x

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Solution for ((7-x)/(7+x))/(7x/x^2-49)=x equation:


D( x )

x+7 = 0

(7*x)/(x^2)-49 = 0

x^2 = 0

x+7 = 0

x+7 = 0

x+7 = 0 // - 7

x = -7

(7*x)/(x^2)-49 = 0

(7*x)/(x^2)-49 = 0

7*x^-1 = 49 // : 7

x^-1 = 7

-1 < 0

1/(x^1) = 7 // * x^1

1 = 7*x^1 // : 7

1/7 = x^1

x = 1/7

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

x in (-oo:-7) U (-7:0) U (0:1/7) U (1/7:+oo)

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

((7-x)/(x+7))/((7*x)/(x^2)-49)-x = 0

(7-x)/((x+7)*(7*x^-1-49))-x = 0

(7-x)/((x+7)*(7*x^-1-49))+(-x*(x+7)*(7*x^-1-49))/((x+7)*(7*x^-1-49)) = 0

7-x*(x+7)*(7*x^-1-49)-x = 0

49*x^2+335*x-42 = 0

49*x^2+335*x-42 = 0

49*x^2+335*x-42 = 0

DELTA = 335^2-(-42*4*49)

DELTA = 120457

DELTA > 0

x = (120457^(1/2)-335)/(2*49) or x = (-120457^(1/2)-335)/(2*49)

x = (120457^(1/2)-335)/98 or x = (-(120457^(1/2)+335))/98

(x+(120457^(1/2)+335)/98)*(x-((120457^(1/2)-335)/98)) = 0

((x+(120457^(1/2)+335)/98)*(x-((120457^(1/2)-335)/98)))/((x+7)*(7*x^-1-49)) = 0

((x+(120457^(1/2)+335)/98)*(x-((120457^(1/2)-335)/98)))/((x+7)*(7*x^-1-49)) = 0 // * (x+7)*(7*x^-1-49)

(x+(120457^(1/2)+335)/98)*(x-((120457^(1/2)-335)/98)) = 0

( x+(120457^(1/2)+335)/98 )

x+(120457^(1/2)+335)/98 = 0 // - (120457^(1/2)+335)/98

x = -((120457^(1/2)+335)/98)

( x-((120457^(1/2)-335)/98) )

x-((120457^(1/2)-335)/98) = 0 // + (120457^(1/2)-335)/98

x = (120457^(1/2)-335)/98

x in { -((120457^(1/2)+335)/98), (120457^(1/2)-335)/98 }

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