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Clara0628
@Clara0628
May 2019
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Bonjour à tous j'ai un exercice de maths à faire je comprends pas du tout
1)Développer en detaillant les étapes et réduire
2)l'égalité À=B est elle vraie pour y=3
*le y correspond au x
A=6y²-4-(2y²-4y+6)+(4y-5)x3y+8y
B=(8y-4)(5-2y)+3y-15
Merci d'avance
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winner123
Verified answer
Bonsoir
A = 6 y² - 4 - 2 y² + 4 y - 6 + 12 y² - 15 y + 8 y
A =
16 y² - 11 y - 10
B = 40 y - 16 y² - 20 + 8 y + 3 y - 15
b =
- 16 y² + 51 y - 35
pour y = 3
a = 144 - 33-10= 101
b = -144 +153 -35 = -26
donc A≠B
0 votes
Thanks 1
nonotata
Bonsoir
A=6y²-4-(2y²-4y+6)+(4y-5)x3y+8y
a = 6y² -4 -2y²+4y-6+12y²-15y+8y
a = 16y²-3y -10
B=(8y-4)(5-2y)+3y-15
b = 40y-16y²-20+8y+3y-15
b = -16y²+51y -35
a = 16y²-3y-10
a =16(3)² -3(3) -10
a = 16(9) -9-10
a = 144-19
a = 125
b = -16y² +51y-35
b = -16(3)² +51(3) -35
b = -16(9) +153 -35
b = -144-35 +153
b = - 179+153
b = -16
doncl'égalité À=B n est pas vraie pour y=3
1 votes
Thanks 1
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Verified answer
BonsoirA = 6 y² - 4 - 2 y² + 4 y - 6 + 12 y² - 15 y + 8 y
A = 16 y² - 11 y - 10
B = 40 y - 16 y² - 20 + 8 y + 3 y - 15
b = - 16 y² + 51 y - 35
pour y = 3
a = 144 - 33-10= 101
b = -144 +153 -35 = -26
donc A≠B
A=6y²-4-(2y²-4y+6)+(4y-5)x3y+8y
a = 6y² -4 -2y²+4y-6+12y²-15y+8y
a = 16y²-3y -10
B=(8y-4)(5-2y)+3y-15
b = 40y-16y²-20+8y+3y-15
b = -16y²+51y -35
a = 16y²-3y-10
a =16(3)² -3(3) -10
a = 16(9) -9-10
a = 144-19
a = 125
b = -16y² +51y-35
b = -16(3)² +51(3) -35
b = -16(9) +153 -35
b = -144-35 +153
b = - 179+153
b = -16
doncl'égalité À=B n est pas vraie pour y=3