Bonjour comment on factorise et developpe cette expression: (3-x)au carré - 16 ?

By: USER4162
27 Agustus 2025 mathematiques 5 minutes
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Question

Grade: Education Subject: mathematiques
Bonjour comment on factorise et developpe cette expression: (3-x)au carré - 16 ?
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Best Answer
(149)
factoriser : 
(3-x)² - 16 = (3-x)² - 4² = (3-x-4)(3-x+4) = (-1-x)(7-x)

développer :
(3-x)² - 16 = 9 - 6x + x² - 16 = x² - 6x - 7
Answered on 27 Agustus 2025
(258)
Factorisation :

(3 - x)² - 16
= (3 - x)² - 4²
= (3 - x + 4)(3 - x - 4)
= (7 - x)(- x - 1)

Développement :

(3 - x)² - 16
= 9 - 6x + x² - 16
= x² - 6x - 7
Answered on 27 Agustus 2025

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