Réponse :
Explications étape par étape :
1. A = 13x² – 9x + 18 – 25x² – 34x – 50
A= – 12x² – 43x – 32
2. B = 5z (3z – 9) – 6z² + 17z – 4
B = 5z*3z – 5z*9 – 6z² + 17z – 4
B = 15z² – 45z – 6z² + 17z – 4
B = 9z² – 28z – 4
bon courage!
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Réponse :
Explications étape par étape :
1. A = 13x² – 9x + 18 – 25x² – 34x – 50
A= – 12x² – 43x – 32
2. B = 5z (3z – 9) – 6z² + 17z – 4
B = 5z*3z – 5z*9 – 6z² + 17z – 4
B = 15z² – 45z – 6z² + 17z – 4
B = 9z² – 28z – 4
bon courage!