a. \(2x^3y - 4x^2y+2xy\)
= \(2xy(x^2-2x+1)\)
= \(2xy(x-1)^2\)
b, \((x-2)^2 - 36\)
= \((x-2)^2 - 6^2\)
= \((x-2-6)(x-2+6)\)
= \((x-8)(x+4)\)
c, \(x^3+3x^2-4x-12\)
= \((x^3+3x^2) - (4x+12)\)
= \(x^2(x+3) - 4(x+3)\)
= \((x+3)(x^2-4)\)
= \((x+3)(x-2)(x+2)\)
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