bonjour
D = 4y x 21y = 4x21 x yxy = 84y²
E = 7,2 x 1,1 x a x a - 2a = 7,92a² - 2a
et F = -3z + 1,2 x 6 x z x z + 5z
= -3z + 5z + 7,2z²
= 7,2z² + 2z
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bonjour
D = 4y x 21y = 4x21 x yxy = 84y²
E = 7,2 x 1,1 x a x a - 2a = 7,92a² - 2a
et F = -3z + 1,2 x 6 x z x z + 5z
= -3z + 5z + 7,2z²
= 7,2z² + 2z