Bonsoir merci a ceux qui vont maider Cordialement.​

a.9x^2+3x-10-5x-3
9x^2-2x-10-3
9x^2-2x-13
9x^2-2x-13

b. 7+4x+3-2x^2
10+4x-2x^2
-2x^2+4x+10
-2x^2+4x+10

c. 3x-7x^2+6x-2
9x-7x^2-2
-7x^2+9x-2
-7x^2+9x-2

b. 1+x-3
-2+x
-2+x