Odpowiedź:
[tex](a+b)^2=a^2+2ab+b^2\\\\\\a)\ \ (2+\sqrt{3})^2=2^2+2\cdot2\sqrt{3}+(\sqrt{3})^2=4+4\sqrt{3}+3=7+4\sqrt{3}\\\\b)\ \ (5+\sqrt{2})^2=5^2+2\cdot5\cdot\sqrt{2}+(\sqrt{2})^2=25+10\sqrt{2}+2=27+10\sqrt{2}[/tex]
