(28x)/(49-x^2)

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Solution for (28x)/(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)

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

28*x = 0 // : 28

x = 0

x = 0

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