Question

So sánh: \(\sqrt{4.25}\) và \(\sqrt{4}.\sqrt{25}\).

Answer 1

Ta có:

\(\begin{array}{l}\sqrt {4.25}  = \sqrt {100}  = 10\\\sqrt 4 .\sqrt {25}  = 2.5 = 10\end{array}\)

Vậy \(\sqrt {4.25}  = \sqrt 4 .\sqrt {25} \).