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Lucasren
@Lucasren
May 2019
2
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Bonjour,
J'ai bersoins d'aide pour cette exercice de maths :
A = 3(5-2x)+4x
B= (5x+2)(2x+3)
C= (3x-5)(2-2x)
D= (3x-1)²
E= (4x+5)²-(2x-6)(3-2x)
Merci beaucoup!
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nadiab
Développer et réduire
A = 3(5-2x)+4x
A= 15-6x+4x
A= -2x+15
B= (5x+2)(2x+3)
B= 10x²+4x+15x+6
B= 10x²+19x+6
C= (3x-5)(2-2x)
C= 6x-10-6x²+10x
C= -6x²+16x-10
D= (3x-1)²
D= 9x²-3x-3x+1
D= 9x²-6x+1
E= (4x+5)²-(2x-6)(3-2x)
E= 16x²+20x+20x+25 -(6x-18-4x²+12x)
E= 16x²+40x+25-(-4x²+18x-18
E= 16x²+40x+25+4x²-18x+18
E= à toi de réduire
2 votes
Thanks 0
1234Farid
A=15-6x+4x=15-2x
B=10x^2+19x+6
C=6x-6x^2-10+10x
=-6x^2+16x-10
D(identité remarquable)
D=9x^2-6x+1
E=16x^2+40x+25-(-4x^2+18x-18)
=20x^2+32x+43
0 votes
Thanks 0
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A = 3(5-2x)+4x
A= 15-6x+4x
A= -2x+15
B= (5x+2)(2x+3)
B= 10x²+4x+15x+6
B= 10x²+19x+6
C= (3x-5)(2-2x)
C= 6x-10-6x²+10x
C= -6x²+16x-10
D= (3x-1)²
D= 9x²-3x-3x+1
D= 9x²-6x+1
E= (4x+5)²-(2x-6)(3-2x)
E= 16x²+20x+20x+25 -(6x-18-4x²+12x)
E= 16x²+40x+25-(-4x²+18x-18
E= 16x²+40x+25+4x²-18x+18
E= à toi de réduire
B=10x^2+19x+6
C=6x-6x^2-10+10x
=-6x^2+16x-10
D(identité remarquable)
D=9x^2-6x+1
E=16x^2+40x+25-(-4x^2+18x-18)
=20x^2+32x+43