Bonsoir,
écrire chaque expression sous la forme d’un quotient:
A= [ 4(x+2)+5(2x+3)] /(5*4)= (4x+8+10x+15)/20= (14x+23)/20
B= [ 3(2x-1) - 4(4x+2) ] / (4*3)= (6x-3-16x-8)/12= (-10x-11)/12
C= [ (2*4- x(x+3) ]/(x*4)= (8-x²+3x)/4x
D= [ 5x(x+1) ] +2/ (x+1)= (5x²+5x+2)/(x+1)
E= (2x+3)-5(2x) /5=(2x+3-10x)/5= (-8x+3)/5
