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Phospho
@Phospho
April 2019
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Développer et réduire les expressions
A = (x-3)² + x (x+5)
B = (2x+3)² -2(x-5)²
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maudefernandez
A = (x-3)² + x (x+5)
= x
²-6x+9 + x² + 5x
= 2x² - x + 9
B = (2x+3)² -2(x-5)²
= 4x² + 12x + 9 - 2 (x² - 10x + 25)
= 4x² + 12x + 9 - 2x² + 20x - 50
= 2x² + 36x - 41
1 votes
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Lista de comentários
= x²-6x+9 + x² + 5x
= 2x² - x + 9
B = (2x+3)² -2(x-5)²
= 4x² + 12x + 9 - 2 (x² - 10x + 25)
= 4x² + 12x + 9 - 2x² + 20x - 50
= 2x² + 36x - 41