91=x^2(91/x^2)

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Solution for 91=x^2(91/x^2) equation: 


D( x )

x^2 = 0

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

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

91 = (91/(x^2))*x^2 // - (91/(x^2))*x^2

91-((91/(x^2))*x^2) = 0

91-91 = 0

0 = 0

x należy do R

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

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