Question

Rút gọn:

a)\(\sqrt{\left(3-\sqrt{7}\right)^2}-\sqrt{\left(2\sqrt{7}-6\right)^2}\)

b)\(\sqrt{\left(\sqrt{2}-\sqrt{3}\right)^2}-\sqrt{\left(2\sqrt{3}-3\sqrt{2}\right)^2}\)

Answer 1

https://i.imgur.com/nINJTv5.jpg

Answer 2

a) \(=\left(3-\sqrt{7}\right)-\left(6-2\sqrt{7}\right)\)

\(=\sqrt{7}-3\)

b) \(=\left(\sqrt{3}-\sqrt{2}\right)-\left(3\sqrt{2}-2\sqrt{3}\right)\)

\(=3\sqrt{3}-4\sqrt{2}\)

Answer 3

a) (Biều thức ban đầu) = \(3-\sqrt{7}-\left(6-2\sqrt{7}\right)\)=\(-3+\sqrt{7}\)

b) (Biểu thức ban đầu) = \(\sqrt{3}-\sqrt{2}-\left(3\sqrt{2}-2\sqrt{3}\right)\)= \(-\sqrt{3}-4\sqrt{2}\)