Factoriser : R= (2x-1)²-64
Mathématiques
lenatbre1
Question
Factoriser :
R= (2x-1)²-64
R= (2x-1)²-64
2 Réponse
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1. Réponse nonotata
(2x-1)² -8²
(2x-1-8)(2x-1+8)
(2x-9)(2x+7)
(2x-9) (2x+7) =0
2x-9 =0 2x+7 =0
2x = 9 2x = -7
x = 9/2 x = - 7/2
solution ( 9/2 ; -7/2) -
2. Réponse PAU64
R = (2x - 1)² - 64
R = (2x - 1)² - 8²
R = (2x - 1 - 8) (2x - 1 + 8)
R = (2x - 9) (2x + 7)