Réponse : x²+2x+1= (x+1²)
9X²+12x+4=(3x+2)²
16x²-8²=-8
x²-20x+100=100
4x²+4+8x=4
explications : Tkt
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Réponse : x²+2x+1= (x+1²)
9X²+12x+4=(3x+2)²
16x²-8²=-8
x²-20x+100=100
4x²+4+8x=4
explications : Tkt