Bonjour, je dois calculer ces expressions et je n'y comprends rien . C'est sur la double distributivité.
(y-6)(7y+9)
(2x+4)(7-2)
(4y+8x)(5+8y)
(y-6)(7y+9)
(2x+4)(7-2)
(4y+8x)(5+8y)
More Questions From This User See All
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
(y-6)(7y+9)
= y × 7y + y × 9 - 6 × 7y - 6 × 9
= 7y² + 9y - 42y - 54
= 7y² - 33y - 54
(2x+4)(7-2)
= 2x × 7 + 2x × (-2) + 4 × 7 + 4 × (-2)
= 14x - 4 + 28 - 8
= 14x + 16
(4y+8x)(5+8y)
= 4y × 5 + 4y × 8y + 8x × 5 + 8x × 8y
= 20y + 32y² + 40x + 64xy
= 32y² + (64x + 20y) y + 40x
= 32y² + 64xy + 20y + 40x