22) Développer, puis réduire chaque expression
A = 2(4x - 5) + (5x + 7) - 3(8 + 5x);
B=9(x-8) - (x²-3x) - 7(x-9);
C = -3(1 +4x) - 4(5x + 8) + x(4x - 7);
D = −5(−1 + 3x²) − x(5 + x) − 2x(3 − 2x).
Merci d'avance ​
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