25x^4 -60x^2y^2+36y^4
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Answer:
1x^2/y^2
Step-by-step explanation:
= 25x^4-60x^2y^2+36y^4
= 25-60+36=1
= x^4-x^2,y^2-y^4
= x^4-2,y^2-4
= x^2,y^-2
= 1x^2/y^2
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