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Emmacalvez
@Emmacalvez
May 2019
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Completer en photo svp
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nguyenso9
Verified answer
Identites remarquables :
(a + b)² = a² + 2ab + b²
(a - b)² = a² - 2ab + b²
(a + b)(a - b) = a² - b²
(2/3 - 2a)² = 4/9 - 8/3a + 4a²
(2x + 5)² = 4x² + 20x + 25
(7x + 3)² = 49x² + 42x + 9
(2a - 3/2)(2a + 3/2) = 4a² - 9/4
9a² - 49 = (3a + 7)(3a - 7)
0 votes
Thanks 1
emmacalvez
Tu me rend tellement service, milles merci
LaPerlEDeMath
Verified answer
Bonsoir =)
la reponse est sur feuille ;
pour la deuxieme expression :
(2x + 5)² = 4x² + 20x + 25
2 votes
Thanks 1
emmacalvez
Merci beaucoup à toi
LaPerlEDeMath
avec plaisir =)
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Verified answer
Identites remarquables :(a + b)² = a² + 2ab + b²
(a - b)² = a² - 2ab + b²
(a + b)(a - b) = a² - b²
(2/3 - 2a)² = 4/9 - 8/3a + 4a²
(2x + 5)² = 4x² + 20x + 25
(7x + 3)² = 49x² + 42x + 9
(2a - 3/2)(2a + 3/2) = 4a² - 9/4
9a² - 49 = (3a + 7)(3a - 7)
Verified answer
Bonsoir =)la reponse est sur feuille ;
pour la deuxieme expression :
(2x + 5)² = 4x² + 20x + 25