(7/49-x^2)/(5x/7-x)

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Solution for (7/49-x^2)/(5x/7-x) equation: 


D( x )

(5*x)/7-x = 0

(5*x)/7-x = 0

(5*x)/7-x = 0

-2/7*x = 0 // : -2/7

x = 0

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

(7/49-x^2)/((5*x)/7-x) = 0

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

-1*x^2 = -1/7 // : -1

x^2 = 1/7

x^2 = 1/7 // ^ 1/2

abs(x) = (1/7)^(1/2)

x = (1/7)^(1/2) or x = -(1/7)^(1/2)

x in { (1/7)^(1/2), -(1/7)^(1/2) }

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