1. \( M = 7(2z-3) \)
\( M = 7 \times 2z - 7 \times 3 \)
\( M = 14z - 21 \)
2. \( N = 6(4x-9) \)
\( N = 6 \times 4x - 6 \times 9 \)
\( N = 24x - 54 \)
3. \( P = -8(-5 - 3y) \)
\( P = -8 \times (-5) - (-8) \times 3y \)
\( P = 40 + 24y \)
\( P = 24y + 40 \) (en réordonnant)
4. \( Q = 12(-5 + 3z) \)
\( Q = 12 \times (-5) + 12 \times 3z \)
\( Q = -60 + 36z \)
Donc, les expressions développées sont :
\( M = 14z - 21 \)
\( N = 24x - 54 \)
\( P = 24y + 40 \)
\( Q = -60 + 36z \)
