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tracy97420
@tracy97420
June 2021
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BJR est-ce que vous pouvez m'aider svvvpppppp
1°) (- 2/ 3x + 5/3 ) ( - 2/ 7x - 5/3 )
2°) x ( x + 1 ) ( - x + 2 )
aider moi svvpvpvpp urgent pour demain
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maudmarine
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1°) (- 2/ 3x + 5/3 ) ( - 2/ 7x - 5/3 )
= 4/21x² +10/9x - 10/21x - 25/9
= 36/189x² + 210/189x - 90/189x - 525/189
= 36x² + 210x - 90x - 525
= 36x² + 120x - 525
2°) x ( x + 1 ) ( - x + 2 )
= x (-x² + 2x - x + 2)
= - x³ + 2x² - x² + 2x
= - x³ + x²+ 2x
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Verified answer
1°) (- 2/ 3x + 5/3 ) ( - 2/ 7x - 5/3 )= 4/21x² +10/9x - 10/21x - 25/9
= 36/189x² + 210/189x - 90/189x - 525/189
= 36x² + 210x - 90x - 525
= 36x² + 120x - 525
2°) x ( x + 1 ) ( - x + 2 )
= x (-x² + 2x - x + 2)
= - x³ + 2x² - x² + 2x
= - x³ + x²+ 2x