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sirinemarseille
@sirinemarseille
June 2021
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bonsoir, je dois développer 9-(x+2)² comment puis-je faire?
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rosa1
9-(x+2)²=3²-(x+2)²
=(3+(x+2))(3-(x+2))=(5+x)(1-x)
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sirinemarseille
merci mais pour le (5+x)(1-x) je comprends pas trp d'où sors le 5..
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=(3+(x+2))(3-(x+2))=(5+x)(1-x)