Réponse :
Explications étape par étape :
N = (4z+3)² = 16z²+24z+ 9 identité remarquable
P = 6 + (5y-2)(3-4y) = 6 + 15y-20y²-6+8y = -20y²+23y
Q = 5z - (4z+3)(-2z-5) = 5z - (-8z²-20z-6z-15) = 5z + 8z²+20z+6z+15 = 8z²+26z+15
R = 6(2x-1)(3-x) = (12x-6)(3-x) = 36x-12x²-18+6x = -12x²+42x-18
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Réponse :
Explications étape par étape :
N = (4z+3)² = 16z²+24z+ 9 identité remarquable
P = 6 + (5y-2)(3-4y) = 6 + 15y-20y²-6+8y = -20y²+23y
Q = 5z - (4z+3)(-2z-5) = 5z - (-8z²-20z-6z-15) = 5z + 8z²+20z+6z+15 = 8z²+26z+15
R = 6(2x-1)(3-x) = (12x-6)(3-x) = 36x-12x²-18+6x = -12x²+42x-18