Răspuns :
Bonjour,
(x+4)²-(x-4)(x+4) = x²+8x+16-(x²-16) =
= x²+8x+16-x²+16 = 8x+32.
Succes!
(x+4)²-(x-4)(x+4) = x²+8x+16-(x²-16) =
= x²+8x+16-x²+16 = 8x+32.
Succes!