Question

0,5 supra 2 egal cu la a doua supra 16000

Answer 1

$\dfrac{0,5}{2}=\dfrac{a^2}{16000}\Rightarrow\dfrac{5}{20}=\dfrac{a^2}{16000}\Rightarrow\dfrac{1}4=\dfrac{a^2}{16000},\;sau\; a^2=4000\Rightarrow\\\\\Rightarrow a=\pm\sqrt{4000}=\pm 20\sqrt{10}.$