" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
s2t-(st2-(s2t-(st2-s2t))=s2t-(st2-s2t+st2+s2t)=s2t-(st2+st2-s2t+s2t)=s2t-2st2
tak samo gdzie2 tam kwadrat