(aˆ4-2aˆ2*bˆ2+bˆ4)÷(a+b)ˆ2÷(a-b)O(∩_∩)O谢谢

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(aˆ4-2aˆ2*bˆ2+bˆ4)÷(a+b)ˆ2÷(a-b)O(∩_∩)O谢谢
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(aˆ4-2aˆ2*bˆ2+bˆ4)÷(a+b)ˆ2÷(a-b)O(∩_∩)O谢谢
(aˆ4-2aˆ2*bˆ2+bˆ4)÷(a+b)ˆ2÷(a-b)O(∩_∩)O谢谢

(aˆ4-2aˆ2*bˆ2+bˆ4)÷(a+b)ˆ2÷(a-b)O(∩_∩)O谢谢
(a^4-2a^2b^2+b^4)/(a+b)^2/(a-b)
=(a^2-b^2)^2/(a+b)^2/(a-b)
=(a-b)^2(a+b)^2/(a+b)^2/(a-b)
=a-b

(aˆ4-2aˆ2*bˆ2+b^4)÷(a+b)ˆ2÷(a-b)
=(a^2-b^2)^2/[(a+b)^2*(a-b)]
=[(a-b)^2(a+b)^2]/[(a+b)^2*(a-b)]
=a-b(约分懂的赛)