xy满足(x+y)^2=1/4,xy=-1/2,求下列个数的值.（1）（x^2+1)(y^2+1) (2)x^4+y^4 (3)x^2-y^2 (4)x^6+y^6

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xy满足(x+y)^2=1/4,xy=-1/2,求下列个数的值.（1）（x^2+1)(y^2+1) (2)x^4+y^4 (3)x^2-y^2 (4)x^6+y^6
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xy满足(x+y)^2=1/4,xy=-1/2,求下列个数的值.（1）（x^2+1)(y^2+1) (2)x^4+y^4 (3)x^2-y^2 (4)x^6+y^6
xy满足(x+y)^2=1/4,xy=-1/2,求下列个数的值.
（1）（x^2+1)(y^2+1) (2)x^4+y^4 (3)x^2-y^2 (4)x^6+y^6

xy满足(x+y)^2=1/4,xy=-1/2,求下列个数的值.（1）（x^2+1)(y^2+1) (2)x^4+y^4 (3)x^2-y^2 (4)x^6+y^6
只想出前两题,(1)7/4,(2)1/8

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