Question

\(\sqrt{5^2-4^2}\)

Answer 1

\(\sqrt{5^2-4^2}=\sqrt{\left(5-4\right)\left(5+4\right)}=\sqrt{1}.\sqrt{9}=1.3=3\)

Answer 2

\(\sqrt{5^2-4^2}\)

\(\Leftrightarrow\sqrt{25-4^2}\)

\(\Leftrightarrow\sqrt{25-16}\)

\(\Leftrightarrow\sqrt{9}\)

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