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Anonymous
12 - 4 = (1 * 1) - 4 = 1 - 4 = -3
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No.
'x' is +4 or -4 .
(2x - 1)(x + 4)
simplified it would equal: 24x to the third power - x to the second power - x to the sixth power - 34
4 cubed is 64, 3 squared is 9, so 55.