(1)x²y²-2xy+1 (2)9-12t+4t²(3)y²+y+1/4(4)25m²-80m+64 (5)
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![(1)x²y²-2xy+1 (2)9-12t+4t²(3)y²+y+1/4(4)25m²-80m+64 (5)](/uploads/image/z/8785928-56-8.jpg?t=%EF%BC%881%EF%BC%89x%26%23178%3By%26%23178%3B-2xy%2B1+%EF%BC%882%EF%BC%899-12t%2B4t%26%23178%3B%EF%BC%883%EF%BC%89y%26%23178%3B%2By%2B1%2F4%EF%BC%884%EF%BC%8925m%26%23178%3B-80m%2B64+%EF%BC%885%EF%BC%89)
(1)x²y²-2xy+1 (2)9-12t+4t²(3)y²+y+1/4(4)25m²-80m+64 (5)
(1)x²y²-2xy+1 (2)9-12t+4t²(3)y²+y+1/4(4)25m²-80m+64 (5)
(1)x²y²-2xy+1 (2)9-12t+4t²(3)y²+y+1/4(4)25m²-80m+64 (5)
(xy-1)平方 (3-2t)平方 (y+1/2)平方 (5m-8)平方