Réponse :
C = 5x² - 2x + x (6x -10)
C = 5x²-2x+6x²-10x
C = 11x²-12x
D = – 6y + 4y (y – 3) – 20 ( 1 – 3y )
D = -6y+4y²-12y-(20-60y)
D = -6y+4y²-12y-20+60y
D = 4y²+42y-20
Explications étape par étape :
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Réponse :
C = 5x² - 2x + x (6x -10)
C = 5x²-2x+6x²-10x
C = 11x²-12x
D = – 6y + 4y (y – 3) – 20 ( 1 – 3y )
D = -6y+4y²-12y-(20-60y)
D = -6y+4y²-12y-20+60y
D = 4y²+42y-20
Explications étape par étape :
= 11x² - 12x
D = -6y + 4y² - 12y - 20 + 60y
= 4y² + 42y - 20