1.5 Lösning 2c

\( \, \sqrt{4\,^2 \, + \, 3\,^2} \, = \, \sqrt{4 \cdot 4 \, + \, 3 \cdot 3} \, = \, \sqrt{16 \, + \, 9} \, = \, \sqrt{25} \, = \, 5 \)

\( \, 5 \, + \, 4 \, = \, 9 \, \)

\[ \quad\, 5 \quad \neq \quad 9 \, \]

\( \; \Downarrow \)

\[ \, \sqrt{4\,^2 \, + \, 3\,^2} \; \neq \; 5 \, + \, 4 \]

\( \; \Downarrow \)

  FALSKT