slt,comment developper E=(x-2)²-4x(x-2)
E=(x-2)²-4x(x-2)E=X^2-4x+4-4x^2+8E=-3x^2-4x+12
faux christelle
E= ( x-2)² -4x(x-2)E= x²-4x+4-4x²+8x=-3x²-4x+4