Sagot :
Réponse :
Bonsoir,
(4x - 9)²
= (4x - 9)(4x - 9)
= 4x * 4x - 4x * 9 - 9 * 4x - 9 * 9
= 16x² - 36x - 36x - 81
= 81 + 16x² - 72x
Réponse :
(4x - 9)²
= (4x - 9)(4x - 9)
= 4x * 4x - 4x * 9 - 9 * 4x - 9 * 9
= 16x² - 36x - 36x - 81
= 81 + 16x² - 72x