Respuesta :

culveryolanda46

Step-by-step explanation:

[tex]((x + y) - (x - y) ){}^{2} = 4 {y}^{2} [/tex]

[tex](2y) {}^{2} = 4 {y}^{2} [/tex]

[tex] {2}^{2} {y}^{2} = {4y}^{2} [/tex]

[tex]4 {y}^{2} = 4 {y}^{2} [/tex]

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