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Adrien199928
@Adrien199928
April 2019
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Factoriser cette expression.
Tout à l'heure j'ai poster un exercice et j'ai oublier cette expression pouvez vous m'aidez à la résoudre ?
C= 4(1-6x)(7x-2) + 9(x-3)(7x-2)
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nkar
Salut;
C= 4(1-6x)(7x-2) + 9(x-3)(7x-2)
C=(7x-2)[4(1-6x)+9(x-3)]
C=(7x-2)[4-24x+9x-27]
C=(7x-2)(-15x-23)
Cordialement.
1 votes
Thanks 1
adrien199928
Merci beaucoup !!
nonotata
C= 4(1-6x)(7x-2) + 9(x-3)(7x-2)
c = 4(7x-2-42x²+12x) + 9(7x²-2x-21x+6)
c = 4(-42x²+19x-2) +9(7x²-23x+6)
c = -168x² +76x -8 +63x² -207x +54
c = -105x² -131x +46
factorise
C= 4(1-6x)(7x-2) + 9(x-3)(7x-2)
(7x-2)(4-24x+9x-27)
(7x-2)(-15x -23)
resoudre
7x-2 =0
7x = 2
x = 2/7
et
-15x -23
-15x =23
x = -23/15
2 votes
Thanks 1
adrien199928
Merci encore une fois !!
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C= 4(1-6x)(7x-2) + 9(x-3)(7x-2)
C=(7x-2)[4(1-6x)+9(x-3)]
C=(7x-2)[4-24x+9x-27]
C=(7x-2)(-15x-23)
Cordialement.
c = 4(7x-2-42x²+12x) + 9(7x²-2x-21x+6)
c = 4(-42x²+19x-2) +9(7x²-23x+6)
c = -168x² +76x -8 +63x² -207x +54
c = -105x² -131x +46
factorise
C= 4(1-6x)(7x-2) + 9(x-3)(7x-2)
(7x-2)(4-24x+9x-27)
(7x-2)(-15x -23)
resoudre
7x-2 =0
7x = 2
x = 2/7
et
-15x -23
-15x =23
x = -23/15