c'est les identités remarquables :
(a+b)² = a² + 2ab + b²
(a-b)² = a² - 2ab + b²
(a+b)(a-b) = a² - b²
il y a une erreur dans
(x-5)² = x² +10x +25
en fait
(x-5)² = x² -10x +25
2007-01-25 04:04:53
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answer #1
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answered by Nicolas L 5
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oups, tu t'es trompé pour le premier...
c'est -10x !
2007-01-25 11:57:44
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answer #2
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answered by Serial_Kilter 3
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non !j'ai la migraine ...!!
2007-01-25 11:55:11
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answer #3
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answered by SPOKE 4
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(x-5)2 = x2 - 10x + 25
(6+x)2 = x2 + 12x + 36
(4-x)(4+x) = 16 - x2
J'ai un changement par rapport à toi : -10x au lieu de + 10x
2007-01-25 11:59:45
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answer #4
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answered by ? 4
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(x-5)²=x²-10x+25
(6+x)²=36+12x+x²
(4-x)(4+x)=16-x²
2007-01-25 13:23:48
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answer #5
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answered by cacahute20002000 2
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(x-5)2= =a2-2ab+b2
= x2-10x+25
(6+x)2= =a2+2ab-b2
=x36+12x+x2
(4-x)(4+x)=16-x2 =a2-b2
2007-01-25 12:03:18
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answer #6
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answered by charlotte 3
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(x-5)²= x²-10x+25
(6+x)²=36+12x+x²
(4-x)(4+x)=16-x²
2007-01-25 12:02:38
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answer #7
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answered by caro 6
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-10X au premier
2007-01-25 12:02:09
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answer #8
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answered by Anonymous
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x2-10x+5*5 = (x-5)2=a2-2ab+b2
36+12x+x2 = (6+x)2= a2+2ab+b2
16-x2 = (4-x)(4+x) = a2-b2
C'est correct!
2007-01-25 11:58:22
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answer #9
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answered by ? 4
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