Question

Answer 1

a) \(\sqrt{9.4}=\sqrt{36}=6\)

\(\sqrt{9}.\sqrt{4}=3.2=6\)

\(\Rightarrow\sqrt{9.4}=\sqrt{9}.\sqrt{4}\)

b) \(\sqrt{16+9}=\sqrt{25}=5\)

\(\sqrt{16}+\sqrt{9}=4+3=7\)

\(\Rightarrow\sqrt{16+9}< \sqrt{16}+\sqrt{9}\)

c) \(\sqrt{169-144}=\sqrt{25}=5\)

\(\sqrt{169}-\sqrt{144}=13-12=1\)

\(\Rightarrow\sqrt{169-144}>\sqrt{169}-\sqrt{144}\)