7/x=x/63

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Solution for 7/x=x/63 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x = x/63 // - x/63

7/x-(x/63) = 0

7*x^-1-1/63*x^1 = 0

(7*x^0-1/63*x^2)/(x^1) = 0 // * x^2

x^1*(7*x^0-1/63*x^2) = 0

x^1

(-1/63)*x^2+7 = 0

(-1/63)*x^2+7 = 0

DELTA = 0^2-(4*7*(-1/63))

DELTA = 4/9

DELTA > 0

x = ((4/9)^(1/2)+0)/(2*(-1/63)) or x = (0-(4/9)^(1/2))/(2*(-1/63))

x = -21 or x = 21

x in { -21, 21} 

x in { -21, 21 }

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