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hafid
@hafid
June 2021
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bonjours, pourriez vous m'aider svp
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nathalienouts
1)
a)
A = (3+1)(2-3)+(3-5)(1-1)
A =4*-1 +-2*0 * = multiplié par = fois
A = -4
B = (4-12)(2+3)+3(1-1)+36
B = -8*5+3*0+36
B = -40+36
B = -4
b) non A=B pour x = 1 ne signifie pas que A =B pour toutx
2)
a)
A = (3x+1)(2x-3)+(3-5x)(1-x)
A = 6x²-9x+2x-3+(3-3x-5x+5x²)
A = 6x²-7x-3+3-8x+5x²
A = 11x²-15x
B = (4x-12)(2x+3)+3x(x-1)+36
B = 8x²+12x-24x-36+3x²-3x+36
B = 11x²-15x
b) oui A = B = 11x²-15x pour tout x
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a)
A = (3+1)(2-3)+(3-5)(1-1)
A =4*-1 +-2*0 * = multiplié par = fois
A = -4
B = (4-12)(2+3)+3(1-1)+36
B = -8*5+3*0+36
B = -40+36
B = -4
b) non A=B pour x = 1 ne signifie pas que A =B pour toutx
2)
a)
A = (3x+1)(2x-3)+(3-5x)(1-x)
A = 6x²-9x+2x-3+(3-3x-5x+5x²)
A = 6x²-7x-3+3-8x+5x²
A = 11x²-15x
B = (4x-12)(2x+3)+3x(x-1)+36
B = 8x²+12x-24x-36+3x²-3x+36
B = 11x²-15x
b) oui A = B = 11x²-15x pour tout x