(x^2-49)/(49-x^2)

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


D( x )

49-x^2 = 0

49-x^2 = 0

49-x^2 = 0

-1*x^2 = -49 // : -1

x^2 = 49

x^2 = 49 // ^ 1/2

abs(x) = 7

x = 7 or x = -7

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

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

1*x^2 = 49 // : 1

x^2 = 49

x^2 = 49 // ^ 1/2

abs(x) = 7

x = 7 or x = -7

x in { 7} 

x in { -7} 

x belongs to the empty set

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