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Sagot :

Réponse :

a = 7*4x - 7*1

= 28x - 7

b = 2x²-4x-10x+20

= 2x²-14x+20

c = 12y+18+8y²+12y

= 24y+18+8y²

a = 3x+24+12x-8

= 15x+16

b = 8x²+16x+3x+6

= 8x²+19x+6

c = 6x+18+2x²+8x-x-4

Explications étape par étape

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