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lady55
@lady55
January 2021
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Bonsoir...pourriez vous m'aider pour cet exercice de maths...merci
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elisecuault
Verified answer
Exo1
A = 9x + 90
B= -6x + 66y
1 votes
Thanks 0
lady55
Merci bcp mais pour le 2ème exo svp
swnn
Ex 2:
1. (7+x)(y+3)
= 7*y + 7*3 + x*y +x*3
= 7y + 21 + xy + 3x
2. a) (2+x)(15-y)
= 2*15 + 2*(-y)+ x*15 + x*(-y)
= 30 - 2y + 15x - xy
b) (7+y)(y-4)
= 7*y + 7*(-4) + y*y + y*(-4)
= 7y - 28 + y² - 4y
= y² + 3y - 28
1 votes
Thanks 0
lady55
Ca veut dire quoi les etoiles svp
swnn
c’est pour multiplié
lady55
Ok merci
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Bonsoir! Besoin daide en maths please...je comprends rien...merci
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Verified answer
Exo1A = 9x + 90
B= -6x + 66y
1. (7+x)(y+3)
= 7*y + 7*3 + x*y +x*3
= 7y + 21 + xy + 3x
2. a) (2+x)(15-y)
= 2*15 + 2*(-y)+ x*15 + x*(-y)
= 30 - 2y + 15x - xy
b) (7+y)(y-4)
= 7*y + 7*(-4) + y*y + y*(-4)
= 7y - 28 + y² - 4y
= y² + 3y - 28