Question

phân tích thành nhân tử

5+√5

√33 +√32

3+√3

√14+√7

√15-√6 

7-√7

10-2√10

4-4√5

5-2√5

Answer 1

\(5+\sqrt{5}=\sqrt{5}\left(\sqrt{5}+1\right)\)

\(3+\sqrt{3}=\sqrt{3}\left(\sqrt{3}+1\right)\)

\(\sqrt{14}+\sqrt{7}=\sqrt{7}\left(\sqrt{2}+1\right)\)

\(\sqrt{15}-\sqrt{6}=\sqrt{3}\left(\sqrt{5}-\sqrt{2}\right)\)

\(7-\sqrt{7}=\sqrt{7}\left(\sqrt{7}-1\right)\)

\(10-2\sqrt{10}=\sqrt{10}\left(\sqrt{10}-2\right)=\sqrt{20}\left(\sqrt{5}-\sqrt{2}\right)\)

\(4-4\sqrt{5}=4\left(1-\sqrt{5}\right)\)

\(5-2\sqrt{5}=\sqrt{5}.\left(\sqrt{5}-2\right)\)