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85chacha
@85chacha
May 2019
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Bonsoir, je suis en première S, pouvez-vous me résoudre ses calculs afin que je comprennent mieux svp? ( (2) signifie au carré pour info...)
* 7(x+1)(x+4)
* (169x(2) - 4) + (-7x + 9)(13x+2)
* (5x+12) (8x+9) - (9x+2) (13x+14)
* (7x+9) (7x-2) + (11x+10) (8x-3)
* (-24x+30) + (-13x+9) (-8x+10)=0
* (-10x-9)(2) +(12x+7) (-10x-9)
* (12x+13)(2) +(11x-9) (12x+13)=0
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nadiab
Bonsoir,
* 7(x+1)(x+4)=0
x1= -1 et x2= -4
* (169x(2) - 4) + (-7x + 9)(13x+2)=0
-91x²+441x+14
x1 = 4.87 et x2 =
-0.031
* (5x+12) (8x+9) - (9x+2) (13x+14)=0
-77x²-11x+80
x1 = 0.95et x2 =
-1.09
tu fais pareil pour les deux expressions
* (-10x-9)(2) +(12x+7) (-10x-9)=0
(-10x-9)(2+12x+7)
(-10x-9)(12x+9)
x= -9/10 ou x= -9/12= -3/4
* (12x+13)(2) +(11x-9) (12x+13)=0
(12x+13)(2+11x--9)=0
(12x+13)(11x-7)=0
x= -13/12 ou x= 7/11
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* 7(x+1)(x+4)=0
x1= -1 et x2= -4
* (169x(2) - 4) + (-7x + 9)(13x+2)=0
-91x²+441x+14
x1 = 4.87 et x2 = -0.031
* (5x+12) (8x+9) - (9x+2) (13x+14)=0
-77x²-11x+80
x1 = 0.95et x2 = -1.09
tu fais pareil pour les deux expressions
* (-10x-9)(2) +(12x+7) (-10x-9)=0
(-10x-9)(2+12x+7)
(-10x-9)(12x+9)
x= -9/10 ou x= -9/12= -3/4
* (12x+13)(2) +(11x-9) (12x+13)=0
(12x+13)(2+11x--9)=0
(12x+13)(11x-7)=0
x= -13/12 ou x= 7/11