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loulou62410
@loulou62410
June 2021
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je m entraine pour mon ds mais j ai personne pour me corriger est ce que quelqu 'un peut m'aider les faire pour que je puisse voir si j'ai bon
factoriser les expressions suivantes
49x²-16
9y²-24y+16
(x+1)²-36
25-(2x+3)²
2x²+4x+2
merci de votre aide
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mayatahiri
49x²-16=(7x+4)(7x-4)
9y²-24y+16=(3y-4)²
(x+1)²-36=(x+1+6)(x+1-6)=(x+7)(x-5)
25-(2x+3)²=(5+2x+3)(5-2x-3)=(8+2x)(2+2x)
2x²+4x+2=(
√2x+
√2)²
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9y²-24y+16=(3y-4)²
(x+1)²-36=(x+1+6)(x+1-6)=(x+7)(x-5)
25-(2x+3)²=(5+2x+3)(5-2x-3)=(8+2x)(2+2x)
2x²+4x+2=(√2x+√2)²