Developper : 4 (-y+5) 7x (2+6x) 5 (-8-3x) 7 (3+x) +6 (4x+3) 5+4x (3-6x) -8
Mathématiques
Anonyme
Question
Developper :
4 (-y+5)
7x (2+6x)
5 (-8-3x)
7 (3+x) +6 (4x+3)
5+4x (3-6x) -8
4 (-y+5)
7x (2+6x)
5 (-8-3x)
7 (3+x) +6 (4x+3)
5+4x (3-6x) -8
1 Réponse
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1. Réponse maudmarine
Développer :
4 (- y + 5) = - 4y + 20
7x (2 + 6x) = 14x + 42x = 56x
5 (- 8 - 3x) = - 40 - 15x
7 (3 + x) + 6 (4x + 3) = 21 + 7x + 24x + 18 = 7x + 24x + 21 + 18 = 31x + 39
5 + 4x (3 - 6x) - 8 = 5 + 12x - 24x² - 8 = - 24x² + 12x - 3