Bonjour !
A = 3(-2x + 5) + (-2x + 5)(x - 3)
A = -6x + 15 - 2x² + 5x + 6x - 15
A = 5x - 2x²
B = (2a - 5)(3 - 4a) - 2(5 - a)
B = 6a - 15 - 8a² + 20a - 10 + 2a
B = 28a - 25 - 8a²
C = -(3 - 4z)(z - 2)
C = -(3z - 4z² - 6 + 8z)
C = -(11z - 4z² - 6)
C = -11z + 4z² + 6
D = -5r(2 - 3r) + (-r - 2)(2r + 5)
D = -10r + 15r² - 2r² - 4r - 5r - 10
D = -19r + 13r² - 10
J'espère t'avoir aidé. Bon courage !
