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Pintodacosta50
@Pintodacosta50
April 2019
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Developpe puis reduis ses expressions
3(x+6)+2
4+3(2y-2)
7(2x+2)-6
9(x-6)+2x
3,5(2-x)+8,2
2(3+5x)+8(7-x)+4(x-1)
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PAU64
3 (x + 6) + 2
= 3 * x + 3 * 6 + 2
= 3x + 18 + 2
= 3x + 20
4 + 3 (2y - 2)
= 4 + 3 * 2y + 3 * (- 2)
= 4 + 6y - 6
= 6y - 2
7 (2x + 2) - 6
= 7 * 2x + 7 * 2 - 6
= 14x + 14 - 6
= 14x + 8
9 (x - 6) + 2x
= 9 * x + 9 * (- 6) + 2x
= 9x - 54 + 2x
= 11x - 54
3,5 (2 - x) + 8,2
= 3,5 * 2 + 3,5 * (- x) + 8,2
= 7 - 3,5x + 8,2
= - 3,5x + 15,2
2 (3 + 5x) + 8 (7 - x) + 4 (x - 1)
= 2 * 3 + 2 * 5x + 8 * 7 + 8 * (- x) + 4 * x + 4 * (- 1)
= 6 + 10x + 56 - 8x + 4x - 4
= 6x + 58
PS : la prochaine fois, n'oublie pas les formules de politesse (bonjour, svp, merci...) ! :)
4 votes
Thanks 1
pintodacosta50
D accord merci
pintodacosta50
Je ne voulais pas etre mal élevé
PAU64
de rien :) non ce n'est pas grave ne t'en fais pas ;)
pintodacosta50
Tu peut aller sur mon profile.et repondre a ma autre question svp?
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= 3 * x + 3 * 6 + 2
= 3x + 18 + 2
= 3x + 20
4 + 3 (2y - 2)
= 4 + 3 * 2y + 3 * (- 2)
= 4 + 6y - 6
= 6y - 2
7 (2x + 2) - 6
= 7 * 2x + 7 * 2 - 6
= 14x + 14 - 6
= 14x + 8
9 (x - 6) + 2x
= 9 * x + 9 * (- 6) + 2x
= 9x - 54 + 2x
= 11x - 54
3,5 (2 - x) + 8,2
= 3,5 * 2 + 3,5 * (- x) + 8,2
= 7 - 3,5x + 8,2
= - 3,5x + 15,2
2 (3 + 5x) + 8 (7 - x) + 4 (x - 1)
= 2 * 3 + 2 * 5x + 8 * 7 + 8 * (- x) + 4 * x + 4 * (- 1)
= 6 + 10x + 56 - 8x + 4x - 4
= 6x + 58
PS : la prochaine fois, n'oublie pas les formules de politesse (bonjour, svp, merci...) ! :)