(1).x^2-xy+x (2).m^2n-mn^2+mn (3).9x^3y^3-21x^3y^2+12x^2y^2 (4).x^2(x-y)+y^2(x-y)多项式因式分解

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(1).x^2-xy+x (2).m^2n-mn^2+mn (3).9x^3y^3-21x^3y^2+12x^2y^2 (4).x^2(x-y)+y^2(x-y)多项式因式分解

(1).x^2-xy+x=x(x-y+1)(2).m^2n-mn^2+mn=mn(m-n+1)(3).9x^3y^3-21x^3y^2+12x^2y^2=3x²y²(3xy-7x+4y)(4).x^2(x-y)+y^2(x-y) =(x-y)(x²+y²) 如果本题有什么不明白可以追问,如果满意请点击“...