Factor: x2 - 25
(x + 5)(x - 5)
Factor: 16x2 - 9
(4x + 3)(4x - 3)
Factor: x4 - 9
(x2 + 3)(x2 - 3)
Factor: 4x2 - 4x + 1
(2x - 1)2
Factor: 16x2 - 40x + 25
(4x - 5)2
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