Resposta :
Resposta:
[tex]5z^2-500=0\\\\5z^2-500+500=0+500\\\\5z^2=500\\\\\frac{5z^2}{5}=\frac{500}{5}\\\\z^2=100\\\\z=\sqrt{100},\:z=-\sqrt{100}\\\\z=10,\:z=-10[/tex]
Resposta:
[tex]5z^2-500=0\\\\5z^2-500+500=0+500\\\\5z^2=500\\\\\frac{5z^2}{5}=\frac{500}{5}\\\\z^2=100\\\\z=\sqrt{100},\:z=-\sqrt{100}\\\\z=10,\:z=-10[/tex]