Răspuns:
[tex]\frac{1}{100x^{2} } -\frac{1}{64} =0\\\\\frac{64}{6400x^{2} } -\frac{100x^{2} }{6400x^{2} } =0\\\\64-100x^{2} =0\\-100x^{2} =-64\\100x^{2} =64\\x^{2} =\frac{64}{100} \\x=\sqrt\frac{64}{100} \\x=\frac{8}{10} = 0.8\\[/tex]
Explicație pas cu pas:
