1. tính a) \(\left(2\sqrt{3}+\sqrt{3}\right).\sqrt{15}+\sqrt{45}\) b) \(\left(\sqrt{99}-3\sqrt{3}-\sqrt{11}\right).\sqrt{11}+3\sqrt{33}\) c) \(\frac{1}{3}\sqrt{3}-\frac{1}{4}\sqrt{48}+\frac{2}{5}\sqrt{2}-\frac{1}{4}\sqrt{12}\) d) \(\sqrt{\frac{2+\sqrt{5}}{\sqrt{5}-2}}+\sqrt{\frac{\sqrt{5}+2}{2+\sqrt{5}}}\) help me mk đg cần...
Đọc tiếp
1. tính
a) \(\left(2\sqrt{3}+\sqrt{3}\right).\sqrt{15}+\sqrt{45}\)
b) \(\left(\sqrt{99}-3\sqrt{3}-\sqrt{11}\right).\sqrt{11}+3\sqrt{33}\)
c) \(\frac{1}{3}\sqrt{3}-\frac{1}{4}\sqrt{48}+\frac{2}{5}\sqrt{2}-\frac{1}{4}\sqrt{12}\)
d) \(\sqrt{\frac{2+\sqrt{5}}{\sqrt{5}-2}}+\sqrt{\frac{\sqrt{5}+2}{2+\sqrt{5}}}\)
help me mk đg cần gấp
