1.7 Lösning 2d

\( \, (4 \, - \, 2)\,^2 \, = \, (\,2\,)\,^2 \, = \, 2\,^2 \, = \, 2 \cdot 2 \, = \, 4 \, \)

\( \, 4\,^2 \, - \, 2\,^2 \, = \, 4 \cdot 4 \, \,-\, \, 2 \cdot 2 \, = \, 16 \,-\, 4 \, = \, 12 \, \)

\[ \quad\; 4 \quad \neq \quad 12 \, \]

\( \; \Downarrow \)

\[ \quad\, (4 \, - \, 2)\,^2 \; \neq \; 4\,^2 \, - \, 2\,^2 \, \]

\( \; \Downarrow \)

  FALSKT