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doudounette63
@doudounette63
June 2021
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supprimer les parenthèses puis reduire. pouvez vous m aider ? merci d avance.
si l image est a l envers veuillez m en excusé ma tablette beug.
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FrozenPasta
(-3-x)+(5-2x)-(x-3)
=-3-x+5-2x-x+3
=-4x+5
(5x²+3)-(-4x²-3x+4)
=5x²+3+4x²+3x-4
=9x²+3x-1
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=-3-x+5-2x-x+3
=-4x+5
(5x²+3)-(-4x²-3x+4)
=5x²+3+4x²+3x-4
=9x²+3x-1