Bonjour devoir maison math 3ème A = +(5-7) = ... B = -(3-6) = ... C= 4+3(2-8)= ... D= 4-4(5-7)=... E=x+3(x-2)= F=-3(x-2)+3(2x-5)

A = +5 -7 = -2
B = -3 +6 = +3
C = 4 + 3 (2 -8) = 4 + 3 (-6) = 4 -18 = -14
D = 4 -4 (5 -7) = 4 -4 (-2) = 4 +8 = +12
E = x + 3 (x -2) = x +3x -6 = 4x -6
F = -3(x -2) +3(2x-5)
-3x +6 +6x -15
+3x -9

A=-2
B=-3
c=.-14
D=12
E=4x-3
F=3x-9