几道初二的因式分解,急用的.
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几道初二的因式分解,急用的.
(a-b)(x-y)-(b-a)(x+y).
(a-b)(a^2+9)-6x(b-a)
x^2(x-y)+(y-x)
(x^2-y^2)^2-8(x^2+y^2)
4+12(x-y)+9(x-y)^2
(a-b)(x-y)-(b-a)(x+y).
(a-b)(a^2+9)-6x(b-a)
x^2(x-y)+(y-x)
(x^2-y^2)^2-8(x^2+y^2)
4+12(x-y)+9(x-y)^2
![几道初二的因式分解,急用的.](/uploads/image/z/19243349-53-9.jpg?t=%E5%87%A0%E9%81%93%E5%88%9D%E4%BA%8C%E7%9A%84%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%2C%E6%80%A5%E7%94%A8%E7%9A%84.)
(a-b)(x-y)-(b-a)(x+y).
=(a-b)(x-y)+(a-b)(x+y).
=(a-b)( x-y+(x+y).
=2x(a-b)
(a-b)(a^2+9)-6x(b-a)
=(a-b)(a^2+9)+6x(a-b)
=(a-b)(a^2+9+6x)
x^2(x-y)+(y-x)
= x^2(x-y)-(x-y)
=(x-y)(x^2-1)
=(x-y)(x+1)(x-1)
(x^2-y^2)^2-8(x^2+y^2)
好像有问题
4+12(x-y)+9(x-y)^2
=〖3(x-y)+2〗^2
=(3x-3y+2)^2
=(a-b)(x-y)+(a-b)(x+y).
=(a-b)( x-y+(x+y).
=2x(a-b)
(a-b)(a^2+9)-6x(b-a)
=(a-b)(a^2+9)+6x(a-b)
=(a-b)(a^2+9+6x)
x^2(x-y)+(y-x)
= x^2(x-y)-(x-y)
=(x-y)(x^2-1)
=(x-y)(x+1)(x-1)
(x^2-y^2)^2-8(x^2+y^2)
好像有问题
4+12(x-y)+9(x-y)^2
=〖3(x-y)+2〗^2
=(3x-3y+2)^2