Question

bài 1 : rút gọn a, \(\sqrt{12}-2\sqrt{8}+3\sqrt{75}-\sqrt{72}\)

Answer 1

\(\sqrt{12}-2\sqrt{8}+3\sqrt{75}-\sqrt{72}\)

\(=\sqrt{4.3}-2\sqrt{4.2}+3\sqrt{25.3}-\sqrt{36.2}\)

\(=2\sqrt{3}-4\sqrt{2}+15\sqrt{3}-6\sqrt{2}\)

\(=17\sqrt{3}-10\sqrt{2}\)

Answer 2

\(\sqrt{12}-2\sqrt{8}+3\sqrt{75}-\sqrt{72}=2\sqrt{3}-4\sqrt{2}+15\sqrt{3}-6\sqrt{2}=17\sqrt{3}-10\sqrt{2}\)