No, (3x-1)^2 is not already factored. The expression (3x-1)^2 means that the quantity (3x-1) is squared, but it is not fully expanded or simplified. To fully factorize, you would need to expand the expression by multiplying (3x-1) with itself:
(3x-1)^2 = (3x-1) * (3x-1)
= 9x^2 - 6x + 1
is (3x-1)^2 already factored
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