Répondre :
(a+7)(a+2) = a*a + a*2 + 7*a + 7*2
(a+7)(a+2) = a²+2a+7a+14
(a+7)(a+2) = a² +9a+14
(5+2x)(3x-4) = 15x-20+6x²-8x
(5+2x)(3x-4) = 6x²+7x-20
(a+7)(a+2) = a²+2a+7a+14
(a+7)(a+2) = a² +9a+14
(5+2x)(3x-4) = 15x-20+6x²-8x
(5+2x)(3x-4) = 6x²+7x-20
Bonjour
(A+7)(A+2)
A²+2A+7A+14
A²+9A+14
(5+2X)(3X-4)
15X-20+6X²-8X
6X²+7X-20