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Sagot :

Réponse:

(7*x-3)^2-9 = 7*x*(7*x-6) 

7x(7x−6)

voila jespere que ca ta aidé

TEAMCE

Bonsoir,

Factoriser:

A = (7x - 3)² - 9

A = (7x - 3)² - 3²

→ identité remarquable :

  • a² - b² = (a + b)(a - b)

A = (7x - 3 + 3)(7x - 3 - 3)

A = 7x(7x - 6)

Bonne soirée.

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