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Sagot :

Bonjour,

c=(y+6)(2y+4) =

2y² +4y +12y +24 =

2y² +16y +24

D=-5d+5d(d-2)-6(7-3d)

-5d + 5d² -10d -42 + 18d=

5d² +3d -42

Hello

C = 2y*y + 4*y + 6*2y + 6*4

= 2y² + 4y + 12 y + 24

= 2y² + 16 y + 24

D = -5 d + 5d² -10d - 42 + 18d

= 3 d + 5d² - 42

bonne journée

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