(x∧2+y∧2-2x+1)∧2-4(4y-4xy)(x∧2-y∧2-2x+1) 因式分解.
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(x∧2+y∧2-2x+1)∧2-4(4y-4xy)(x∧2-y∧2-2x+1) 因式分解.
![(x∧2+y∧2-2x+1)∧2-4(4y-4xy)(x∧2-y∧2-2x+1) 因式分解.](/uploads/image/z/19962146-2-6.jpg?t=%EF%BC%88x%E2%88%A72%2By%E2%88%A72-2x%EF%BC%8B1%EF%BC%89%E2%88%A72-4%EF%BC%884y%EF%BC%8D4xy%EF%BC%89%EF%BC%88x%E2%88%A72-y%E2%88%A72-2x%EF%BC%8B1%EF%BC%89+%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3.)
(x^2+y^2-2x+1)^2-(4y-4xy)(x^2-y^2-2x+1)
=[(x-1)^2+y^2]^2+4y(x-1)[(x-1)^2-y^2]
令x-1=m
原式=(m^2+y^2)^2+4ym(m^2-y^2)
=m^4+4m^3y+2m^2y^2-4my^3+y^4
=(m^4+4m^3y+4m^2y^2)-(2m^2y^2+4my^3)+y^4
=(m^2+2my)^2-2(m^2+2my)y^2+(y^2)^2
=(m^2+2my-y^2)^2
=[(x-1)^2+2(x-1)y-y^2]^2 接着要不要分解了?
继续的话
=(x^2-2x+1+2xy-2y-y^2)^2
=[(x^2+2xy+y^2-2(x+y)+1-2y^2]^2
=[(x+y)^2-2(x+y)+1-2y^2]^2
=[(x+y-1)^2-2y^2]^2
=(x+y-1+根号2 *y)^2 *(x+y-1-根号2 *y)^2
=[(x-1)^2+y^2]^2+4y(x-1)[(x-1)^2-y^2]
令x-1=m
原式=(m^2+y^2)^2+4ym(m^2-y^2)
=m^4+4m^3y+2m^2y^2-4my^3+y^4
=(m^4+4m^3y+4m^2y^2)-(2m^2y^2+4my^3)+y^4
=(m^2+2my)^2-2(m^2+2my)y^2+(y^2)^2
=(m^2+2my-y^2)^2
=[(x-1)^2+2(x-1)y-y^2]^2 接着要不要分解了?
继续的话
=(x^2-2x+1+2xy-2y-y^2)^2
=[(x^2+2xy+y^2-2(x+y)+1-2y^2]^2
=[(x+y)^2-2(x+y)+1-2y^2]^2
=[(x+y-1)^2-2y^2]^2
=(x+y-1+根号2 *y)^2 *(x+y-1-根号2 *y)^2
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