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8x squared
(2x - 1)(4x + 1)
2(4x - 3)(x + 3)
4x2 + 8x + 4 = 4 (x2 + 2x + 1) = 4 (x + 1)2
8x + 12 = 4x - 4 8x - 4x = -4 - 12 4x = -16 x = -4