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(1 - x4y4) = (1 + x2y2)*(1 - x2y2)
= (1 + x2y2)*(1 + xy)*(1 - xy)
(1 - xy)(1 + xy)(1 + x^2y^2)
(x - 1)(x + 1)
(2x - 1)(2x + 1)
9(2x - 1)(2x + 1)
(x - 1)(x^2 + x + 1)
(x - 1)(x4 + x3 + x2 + x + 1)
(2x - 1)(4x + 1)
It is (A-1)(A+1) when factored
1, -1, 5, -5
(x + 1)(x - 8)
(t + 1)(2t - 3)
(x-3)(3x+1)
The factors are -1(2x + 1)(3x + 4)
(2x - 1)(4x2 + 2x + 1)
(7a - 1)(6a + 1)
(3x - 1)(3x + 1)