SVP aider moi !!! A= (3x+4)(5x-2)-4(5x-3) ; B= x(5x+7)-(2x-1)(-5x+4) Montrer que A=B.
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Question
SVP aider moi !!!
A= (3x+4)(5x-2)-4(5x-3) ; B= x(5x+7)-(2x-1)(-5x+4)
Montrer que A=B.
A= (3x+4)(5x-2)-4(5x-3) ; B= x(5x+7)-(2x-1)(-5x+4)
Montrer que A=B.
1 Réponse
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1. Réponse maudmarine
A= (3x+4)(5x-2)-4(5x-3)
A = 15x² - 6x + 20x - 8 - 20x + 12
A = 15x² - 6x + 4
B= x(5x+7)-(2x-1)(-5x+4)
B = 5x² + 7x - (- 10x² + 8x + 5x - 4)
B = 5x² + 7x + 10x² - 8x - 5x + 4
B = 15x² - 6x + 4
Montrer que A=B.
A = B
Car
15x² - 6x + 4 = 15x² - 6x + 4