Expressions remarquables Développe. a. (a + b)² = (a + b)(a + b) =.. b. (a - b)² = (a - b)(a - b) =... (a + b)(a - b) = ...... c. Développements​

Réponse:

Bonjour

Explications:

1. [tex]( {a + b})^{2} = (a+b) (a +b) = {a}^{2} + 2ab + {b}^{2} [/tex]
2. [tex] {(a - b)}^{2} = ( a- b)( a- b) \\ = {a}^{2} - 2ab + {b}^{2} [/tex]
3. [tex](a - b)(a + b) = {a}^{2} - {b}^{2} [/tex]