有三道因式分解1.x²-6xy+9y²-3x+9y+2,2.x²+xy-6y²-6x+2y+8,3.m²-2mn+n²-5m+5n+6.
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![有三道因式分解1.x²-6xy+9y²-3x+9y+2,2.x²+xy-6y²-6x+2y+8,3.m²-2mn+n²-5m+5n+6.](/uploads/image/z/744770-2-0.jpg?t=%E6%9C%89%E4%B8%89%E9%81%93%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A31.x%26%23178%3B-6xy%2B9y%26%23178%3B-3x%2B9y%2B2%2C2.x%26%23178%3B%2Bxy-6y%26%23178%3B-6x%2B2y%2B8%2C3.m%26%23178%3B-2mn%2Bn%26%23178%3B-5m%2B5n%2B6.)
有三道因式分解1.x²-6xy+9y²-3x+9y+2,2.x²+xy-6y²-6x+2y+8,3.m²-2mn+n²-5m+5n+6.
有三道因式分解1.x²-6xy+9y²-3x+9y+2,
2.x²+xy-6y²-6x+2y+8,3.m²-2mn+n²-5m+5n+6.
有三道因式分解1.x²-6xy+9y²-3x+9y+2,2.x²+xy-6y²-6x+2y+8,3.m²-2mn+n²-5m+5n+6.
x²-6xy+9y²-3x+9y+2
=(x-3y)²-3(x-3y)+2
=(x-3y-2)(x-3y-1)
x²+xy-6y²-6x+2y+8
=(x+3y)(x-2y)-6x+2y+8
=(x+3y-4)(x-2y-2)
m²-2mn+n²-5m+5n+6
=(m-n)²-5(m-n)+6
=(m-n-3)(m-n-2)