Question

a) √26 +3 và √63

 

Answer 1

So sánh?

\(\sqrt{26}+3=8,09\)

\(\sqrt{63}=7,93\)

\(\Rightarrow\sqrt{26}+3>\sqrt{63}\)

Answer 2

Ta có: \(\left(\sqrt{26}+3\right)^2=35+6\sqrt{26}\)

\(\left(\sqrt{63}\right)^2=63=35+28\)

mà \(6\sqrt{26}=\sqrt{936}>\sqrt{784}=28\)

nên \(\sqrt{26}+3>\sqrt{63}\)