## College Algebra (11th Edition)

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 - $y^{2}$