(3x+2)²-4(x+3)(x-3)=5(x+2)²+36

Răspuns :

9x la 2 +12x+4-4xla 2 +36=5 x la 2 +20x+20+36
5 x la 2 +12x +40=5x la 2 +20x +56
5xla 2-5xla2+12x-20x=-40+56
-8x =16
x=-2
(3x+2)²-4(x+3)(x-3)=5(x+2)²+36=
(3x+2)
²-4(x²-9)=5(x²+4x4+4)=36
-8x=16
x=-2
Asta e raspunsu crede-ma am facut mai repede de la prima rezolvare
succes !! Coronita ?