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wayne973
@wayne973
June 2021
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Ex 2 a rendre demain si possible
Merci de votre coup d'oeil :)
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(2x+1)(x-5)
=2x²-9x-5
x=6 2*36-9*6-5=72-54-5=13
1 votes
Thanks 1
thomasyannick
1. (2x + 1)(x - 5)
2. 2x² - 10x + x - 5 = 2x² - 9x - 5
3. pour x = 6
=> (2x + 1)(x - 5) => remplacer x par 6
(2*6 + 1)(6 - 5) = (13)(1) = 13
=> 2x² - 9x - 5 => remplacer x par 6
2*(6)² - (9*6) - 5 = 2*36 - 54 - 5 = 72 - 59 = 13
3 votes
Thanks 1
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=2x²-9x-5
x=6 2*36-9*6-5=72-54-5=13
2. 2x² - 10x + x - 5 = 2x² - 9x - 5
3. pour x = 6
=> (2x + 1)(x - 5) => remplacer x par 6
(2*6 + 1)(6 - 5) = (13)(1) = 13
=> 2x² - 9x - 5 => remplacer x par 6
2*(6)² - (9*6) - 5 = 2*36 - 54 - 5 = 72 - 59 = 13