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Marjorielekiwi
@Marjorielekiwi
June 2021
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j'ai fais l'exercice mais pour être sur j'aimerais avoir vos réponses car je ne suis pas sur de moi .. 16 points à gagner.Merci à vous.
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slyz007
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A=(3x+7)²
A=9x²+42x+49
B=(12x-11)²
B=144x²-264x+121
C=(20x-15)(20x+15)
C=400x²-225
D=(5x+1)²+(2x+3)(4x-1)
D=25x²+10x+1+8x²-2x+12x-3
D=33x²+20x-2
E=(10x-7)²-(3x+5)(x-3)
E=100x²-140x+49-3x²+9x-5x+15
E=97x²-136x+64
F=(x+2)(x-2)-(4x+1)(3x+5)
F=x²-4-12x²-20x-3x-5
F=-11x²-23x-9
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Marjorielekiwi
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Verified answer
A=(3x+7)²A=9x²+42x+49
B=(12x-11)²
B=144x²-264x+121
C=(20x-15)(20x+15)
C=400x²-225
D=(5x+1)²+(2x+3)(4x-1)
D=25x²+10x+1+8x²-2x+12x-3
D=33x²+20x-2
E=(10x-7)²-(3x+5)(x-3)
E=100x²-140x+49-3x²+9x-5x+15
E=97x²-136x+64
F=(x+2)(x-2)-(4x+1)(3x+5)
F=x²-4-12x²-20x-3x-5
F=-11x²-23x-9