comment resoudre sa svp

Bonsoir Laurybeyonce

[tex](2+\sqrt{3})^2+(1-2\sqrt{3})^2\\=(2^2+2\times2\times\sqrt{3}+(\sqrt{3})^2)+(1^2-2\times1\times2\sqrt{3}+(2\sqrt{3})^2)\\=(4+4\sqrt{3}+3)+(1-4\sqrt{3}+12)\\=(7+4\sqrt{3})+(13-4\sqrt{3})\\=7+13+4\sqrt{3}-4\sqrt{3}\\=20\\\\\boxed{(2+\sqrt{3})^2+(1-2\sqrt{3})^2=20}[/tex]