File: /var/www/content-sp/wiris-cache/015321f47ae5221e76dfbee257e5900b.png
�PNG
IHDR � @ ���! pHYs � ��+ baSE �J�V IDATx��O�UQǏ'#y"�#1�'-"i�$��'IIҢM��hۢ]���xF��K��-[$�H�"�V-I�gD�~��r��9��{�~��w��~��;�s��r�k���o��� �p�4E�~9l��6@ l#�$t�F�!�$����VH�
�����Ǥ+>��f�iZ��rݕkv�}+����>�:��d
���FLO���]����I���m��ԍ'U���H�R�-�ni��w/y��=�I7Ho+TL������uGF�m��K�p��_n�JzE: �y�u�PCd�pؖ�"��e��4Oz$�?\dUi��{�a�N%���MU;�u�CC6&�K]�p؆�Bz���%f��.+n,He������e����4`�^��zĚ,�B�j���h�W��;
� 0N- ��������B-˲ج[_O-d�P���2�j�f�ڭQ�O-���L�Y�RVk��WI�
t�E�]�!�ZHn�b��b56�_+��yg��4˔#�S�15�ȋY��\��<�m�<n���©�t��@G�r����{ިf9T�#��S#��#f9�Zl�F�=od�.�Z0鰺b��X�
N?�m�<~�PWO-��G�ΐ��e+���Ŏ͞��Yt�,����ʽ8[+���
�n=/�mc�M�UO-���2���`/�=ONj�F����k��Ş�@e���:2h� `�ω�����O� 8,�� �pTw�>b�8��[6���ضj�a���HJ�8,�� �) pX���yZE�t8��969M;�����$q�IG,M!���G��r�M*J��tư�*J$���!� y4�����ʈg��PF��� Lt�$�`v�Qm�&g�B:Lګ�T�shP�y��(U$���Dm5>���-%�zpfjΛ��)�+$F%V˼��lz_I��I���:����P�aӏ�%�6���n��e�����f
�d���z�G͚w��<�='�`��͑Lf�L��ʰ�DʨA GtEXtMathML <math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="12px"><mo>=</mo><mfrac><mrow><msup><mi mathvariant="normal">x</mi><mn>2</mn></msup><mo>+</mo><msup><mi mathvariant="normal">y</mi><mn>2</mn></msup><mo>+</mo><mi>xy</mi></mrow><mrow><mfenced separators="|"><mrow><mi mathvariant="normal">x</mi><mo>-</mo><mi mathvariant="normal">y</mi></mrow></mfenced><mo>(</mo><msup><mi mathvariant="normal">x</mi><mn>2</mn></msup><mo>+</mo><msup><mi mathvariant="normal">y</mi><mn>2</mn></msup><mo>+</mo><mi>xy</mi><mo>)</mo></mrow></mfrac><mo>=</mo><mi mathvariant="normal"/><mfrac><mn>1</mn><mrow><mi mathvariant="normal">x</mi><mo>-</mo><mi mathvariant="normal">y</mi></mrow></mfrac><mspace linebreak="newline"/><mo>=</mo><mfrac><mn>1</mn><mrow><mn>19</mn><mo>-</mo><mn>18</mn></mrow></mfrac><mo>=</mo><mn>1</mn></mstyle></math>&�{� IEND�B`�