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    • https://espanol.libretexts.org/Matematicas/Algebra/Libro%3A_Algebra_elemental_(Arnold)/01%3A_La_aritm%C3%A9tica_de_los_n%C3%BAmeros/1.02%3A_Orden_de_Operaciones
      \[\begin{aligned} x^{2} &-2 x y+y^{2} \quad \color{Red} \text{ Original Expression. } \\ &=(\;\;)^{2}-2(\;\;)()+()^{2} \quad \color{Red} \text{ Replace variables with parenthesis. } \\ &=({\color{Red}...\[\begin{aligned} x^{2} &-2 x y+y^{2} \quad \color{Red} \text{ Original Expression. } \\ &=(\;\;)^{2}-2(\;\;)()+()^{2} \quad \color{Red} \text{ Replace variables with parenthesis. } \\ &=({\color{Red}-3})^{2}-2({\color{Red}-3})({\color{Red}2})+({\color{Red}2})^{2} \quad \color{Red} \text{ Substitute } -3 \text{ for } x \text{ and } 2 \text{ for } y \\ &=9-2(-3)(2)+4 \quad \color{Red} \text{ Evaluate exponenets first. } \\ &=9-(-6)(2)+4 \quad \color{Red} \text{ Left to right, multiply: } 2(-3)=-…

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