merci de votre aide !!

D = (3x+4)(3x-4)+4(-2x-3)
D = 9x²-12x+12x-16-8x-12
D = 9x²-8x-28
D(0) =9x0-8x0-28 = -28

E = (2x+4)²-(2x+3)²
E = 4x²+16x+16-4x²-12x-9
E = 4x+7
E(-2) = 4x-2 + 7 = -8+7 = -1