Answer
2(6x-y)(x+4y)
Work Step by Step
12$x^{2}$+46xy-8$y^{2}$=2(6$x^{2}$+23xy-4$y^{2}$)=
2(6$x^{2}$+24xy-xy-4$y^{2}$)=2[6x(x+4y)-y(4+y)]=2(6x-y)(x+4y)
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