(16 + 4x)/2
2(4 + x)
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Depending on the missing operational sign, that would be 2(x plus or minus 8)
3x + 2x - 8x + 2x = -x
4x2 - 12x + 9 = 4x2 - 6x - 6x + 9 = 2x(2x - 3) - 3(2x - 3) = (2x - 3)(2x - 3) or (2x - 3)2
-2x + 6 + 22 = -2x + 28
Do you mean like this: (x + 5)(2x + 7) If so, then it means you multiply.