Answer
(3x - y)(4x + y)
Work Step by Step
Check factorization with FOIL:
(3x - y)(4x + y) = 3x(4x) + 3x(y) - y(4x) - y(y) = 12$x^{2}$ + 3xy - 4xy - $y^{2}$ = 12$x^{2}$ - xy - $y^{2}$
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