因式分解;3x^2-6xy+x
问题描述：
因式分解;3x^2-6xy+x
①3x^2-6xy+x
②-4a^3+16a^2-18a
③10m^2n^2-15m^3n+5m^2n
答
①3x²-6xy+x
=x(3x-6y+1)
②-4a³+16a²-18a
=-2a(2a²-8a+9)
③10m²n²-15m³n+5m²n
=5m²n(2n-3m+1)