Respuesta :

[tex]\bf (x-y)^2\implies x^2-2xy+y^2\qquad \begin{cases} x^2=25\\ x=\sqrt{25}\\ x=5\\ -----\\ y^2=9\\ y=\sqrt{9}\\ y=3 \end{cases} \\\\\\ (25)-2(5)(3)+(9)\implies 25-30+9[/tex]