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

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


D( x )

x^2-49 = 0

x^2-49 = 0

x^2-49 = 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)

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

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

49-7*x = 0 // - 49

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

x = -49/(-7)

x = 7

x in { 7} 

x belongs to the empty set

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