Answered

Bonjour pouvez m'aidez a resoudre mais equations? a=7(x-3)+(4x-5) b=7x-3(4x-5) c=(2x+1)(3x-2) d=(4x-3)au carre e=(2x-7)(2x+7)

Sagot :

Salut

A = 7x-21+4x-5

= 11x-26

B = 7x-12x+15

= -5x+15

C = 2x*3x+1*3x-2*2x-2*1

= 6x²+3x-4x-2

= 6x²-x-2

D = (4x-3)²

= (4x)²-2*4x*3+3²

= 16x² - 24x +9

E = (2x)²-7²

= 4x²-49