6道因式分解（要过程）1.(a²-b²)²+（a²+2b&#

6道因式分解（要过程）1.(a²-b²)²+（a²+2b&#

1.(a²-b²)²+（a²+2b²)²=2a^4+2a²b²+5b^4=不能分解因式了2.3a-12a²+18a³=3a(1-4a+6a²)3.(x+y)²(x-y)-(x+y)(x-y)²=(x+y)(x-y)(x+y-x+y)=2y(x+y)(x-y)4.x²y²-x²-y²+1=x²(y²-1)-(y²-1）=(y²-1)(x²-1)=(y+1)(y-1)(x+1)(x-1)5.x²-2x-4y²-4y=x²-4y²-2x-4y=(x+2y)(x-2y)-2(x+2y)=(x+2y)(x-2y-2)6.(a²-2b²+4）（a²+2b²-4）======以下答案可供参考======供参考答案1:1、 (a²-b²)²+(a²+2b²)²=a^4+b^4-2a^2*b^2+a^4+4b^4+4a^2*b^2=2a^4+5b^4+2a^2*b^2在实数范围内不能分解；2、3a(1-4a+6a^2)3、(x-y)(x+y)(x+y-x+y)=2y(x-y)(x+y)4、x^2(y^2-1)-(y^2-1)=(x^2-1)(y^2-1)=(x-1)(x+1)(y-1)(y+1)5、(x^2-2x+1)-(4y^2+4y+1)=(x-1)^2-(2y+1)^2=(x-1+2y-1)(x-1-2y+1)=(x-2y)(x+2y-2)6、(a²-2b²+4)(a²+2b²-4）

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