[tex]Dane~~wyrazenie:~~\dfrac{x^{2} }{x^{2} -3} \\\\a)~~gdy:~~x=0\\\\\dfrac{0^{2} }{0^{2} -3}=\dfrac{0 }{0 -3}=\dfrac{0}{-3} =0\div (-3) = 0\\\\\\b)~~gdy:~~x=-1\\\\\dfrac{(-1)^{2} }{(-1)^{2} -3}=\dfrac{1 }{1 -3}=\dfrac{1}{-2} =-\dfrac{1}{2} \\\\\\c)~~gdy:~~x=\sqrt{2} \\\\\dfrac{(\sqrt{2} )^{2} }{(\sqrt{2} )^{2} -3}=\dfrac{2 }{2 -3}=\dfrac{2}{-1} =-2[/tex]
