Răspuns :
(x-1)²+(x+3)²-2(x+2)(x-2)
(((x-1)²)+((x+3)²))-(2*(x+2)*(x-2))
(((x-1)²)+((x+3)²))-2*(x+2)*(x-2)
4x+18=2*(2x+9)
(((x-1)²)+((x+3)²))-(2*(x+2)*(x-2))
(((x-1)²)+((x+3)²))-2*(x+2)*(x-2)
4x+18=2*(2x+9)