26-04-2014
Mathematics

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How do you do 81x^2=49

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Аноним Аноним

14-07-2014

[tex]81x^2=49\ \ \ \ /:81\\\\x^2=\frac{49}{81}\\\\x=\pm\sqrt\frac{49}{81}\\\\x=-\frac{7}{9}\ \vee\ x=\frac{7}{9}[/tex]

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