Răspuns:
[tex]a) {x}^{2} - 2xy + {y}^{2} = {(x - y)}^{2} \\d)9 {x}^{2} - 24xy + 16 {y}^{2} = ( {3x - 4y)}^{2} \\ g) {x}^{2} - 12x + 36 = ( {x - 6)}^{2} \\ j)9 {x}^{2} - 12x + 4 = ( {3x - 2)}^{2} [/tex]
