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(1)3-9x=3(1-3x)
(2)-4x³+8x=4x(-x²+2)=-4x(x+√2)(x-√2)
(3)-6x³-9x²=-3x²(2x+3)
(4)3xy²-9xy=3xy(y-3)
(5)16x³y²+8x²y-4x²y²=4x²y(4xy+2-y)
(6)-ab+a²b²-a³b²=-ab(1-ab+a²b)
(7)(1/2)x²y²-x²y+2x³yz=(1/2)x²y(y-2x+4xz)
(8)-(2/3)ax²+(1/4)ax-6a=-(1/12)a(8x²-3x+72)
(2)-4x³+8x=4x(-x²+2)=-4x(x+√2)(x-√2)
(3)-6x³-9x²=-3x²(2x+3)
(4)3xy²-9xy=3xy(y-3)
(5)16x³y²+8x²y-4x²y²=4x²y(4xy+2-y)
(6)-ab+a²b²-a³b²=-ab(1-ab+a²b)
(7)(1/2)x²y²-x²y+2x³yz=(1/2)x²y(y-2x+4xz)
(8)-(2/3)ax²+(1/4)ax-6a=-(1/12)a(8x²-3x+72)
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