Svp vous pouvez m'aider a developper et réduire cs expression A = (x-2)(x+2) B= (5-y)(5+y) C = (3x+5)(3x-5) D = (10-7z)(10+7z) E = (5+4g)(5-4g)
Mathématiques
AddictOreo
Question
Svp vous pouvez m'aider a developper et réduire cs expression
A = (x-2)(x+2)
B= (5-y)(5+y)
C = (3x+5)(3x-5)
D = (10-7z)(10+7z)
E = (5+4g)(5-4g)
A = (x-2)(x+2)
B= (5-y)(5+y)
C = (3x+5)(3x-5)
D = (10-7z)(10+7z)
E = (5+4g)(5-4g)
1 Réponse
-
1. Réponse maudmarine
A = (x-2)(x+2)
A = x² + 2x - 2x - 4
A = x² - 4
B= (5-y)(5+y)
B = 25 + 5y - 5y - y²
B = - y² + 25
C = (3x+5)(3x-5)
C = 9x² - 15x + 15x - 25
C = 9x² - 25
D = (10-7z)(10+7z)
D = 100 + 70z - 70z - 49z
D = - 49z + 100
E = (5+4g)(5-4g)
E = 25 - 20g + 20g - 16g²
E = - 16g² + 25