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ChaLaBoss75
@ChaLaBoss75
January 2021
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Bonjour bonjours, quelqu'un pourrais m'aidé à développer et réduire le calcul de l'ex 2
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MAHAM
Salut
1)
A=4x²-25-(2x-5)(3x-7)
A=4x²-25-(6x²-14x-15x+35)
A=4x²-25-6x²+29x-35
A=-2x²+29x-60
2)
4x²-25=(2x-5)(2x+5)
b)
A=4x²-25-(2x-5)(3x-7)
A=(2x-5)(2x+5)-(2x-5)(3x-7)
A=(2x-5)[(2x+5)-(3x-7)]
A=(2x-5)(2x+5-3x+7)
A=(2x-5)(-x+12)
3 ) pour x=2,5
A=4(2,5)²-25-(2×2,5-5)(3×2,5-7)
JE te laisse terminer
2 votes
Thanks 1
ChaLaBoss75
Merci bcp
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1)
A=4x²-25-(2x-5)(3x-7)
A=4x²-25-(6x²-14x-15x+35)
A=4x²-25-6x²+29x-35
A=-2x²+29x-60
2)
4x²-25=(2x-5)(2x+5)
b)
A=4x²-25-(2x-5)(3x-7)
A=(2x-5)(2x+5)-(2x-5)(3x-7)
A=(2x-5)[(2x+5)-(3x-7)]
A=(2x-5)(2x+5-3x+7)
A=(2x-5)(-x+12)
3 ) pour x=2,5
A=4(2,5)²-25-(2×2,5-5)(3×2,5-7)
JE te laisse terminer