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Ответ дан
sergeevaolga5

x^4-x^2y^2+ay^2-ax^2-x^2+a=\=(x^4-x^2y^2)-(ax^2-ay^2)-(x^2-a)=\=x^2(x^2-y^2)-a(x^2-y^2)-(x^2-a)=\=(x^2-y^2)(x^2-a)-(x^2-a)=\=(x^2-a)(x^2-y^2-1)

Ответ

Ответ дан
igundane

x^4-x^2y^2+ay^2-ax^2-x^2+a=\=y^2(a-x^2)+(a-x^2)(1-x^2)=\=(a-x^2)(y^2-x^2+1)

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