Bonjour Maeladoujini9p3hana il
[tex]C=\sqrt{3}-5\sqrt{12}+\sqrt{300}\\\\C=\sqrt{3}-5\sqrt{4\times3}+\sqrt{100\times3}\\\\C=\sqrt{3}-5\sqrt{4}\times\sqrt{3}+\sqrt{100}\times\sqrt{3}\\\\C=\sqrt{3}-5\sqrt{4}\times\sqrt{3}+\sqrt{100}\times\sqrt{3}\\\\C=\sqrt{3}-5\times2\times\sqrt{3}+10\times\sqrt{3}\\\\C=\sqrt{3}-10\times\sqrt{3}+10\times\sqrt{3}\\\\\boxed{C=\sqrt{3}}[/tex]
