分解因式1、2a(a-b)+4a(2a+3b) 2、a(a+b)(a-b)-a(a+b)的平方 3、x(x-y)的立方+y(y-x)的立方

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 05:54:39
分解因式1、2a(a-b)+4a(2a+3b) 2、a(a+b)(a-b)-a(a+b)的平方 3、x(x-y)的立方+y(y-x)的立方

分解因式1、2a(a-b)+4a(2a+3b) 2、a(a+b)(a-b)-a(a+b)的平方 3、x(x-y)的立方+y(y-x)的立方
分解因式1、2a(a-b)+4a(2a+3b) 2、a(a+b)(a-b)-a(a+b)的平方 3、x(x-y)的立方+y(y-x)的立方

分解因式1、2a(a-b)+4a(2a+3b) 2、a(a+b)(a-b)-a(a+b)的平方 3、x(x-y)的立方+y(y-x)的立方
1、2a(a-b)+4a(2a+3b)
=2a[(a-b)+2(2a+3b)]
=2a(5a+5b)
=10a(a+b)
2、a(a+b)(a-b)-a(a+b)²
=a(a+b)[(a-b)-(a+b)]
=-2ab(a+b)
3、x(x-y)³+y(y-x)³
=x(x-y)³-y(x-y)³
=(x-y)(x-y)³
=(x-y)^4

1、2a(a-b)+4a(2a+3b) =2a[(a-b)+2(2a+3b) ]=2a(5a+5b)=10a(a+b)
2、a(a+b)(a-b)-a(a+b)^2=a(a+b){(a-b)-(a+b)}=-2ab(a+b)
3、x(x-y)^3+y(y-x)^3=x(x-y)^3-y(x-y)^3=(x-y)^3(x-y)=(x-y)^4

1、2a(a-b)+4a(2a+3b)
=2a²-2ab+8a²+12ab
=10a²+10ab
2、a(a+b)(a-b)-a(a+b)²
=(a²+ab)(a-b)-a(a²+2ab+b²)
=a³-a²b+a²b-ab²-a³+2...

全部展开

1、2a(a-b)+4a(2a+3b)
=2a²-2ab+8a²+12ab
=10a²+10ab
2、a(a+b)(a-b)-a(a+b)²
=(a²+ab)(a-b)-a(a²+2ab+b²)
=a³-a²b+a²b-ab²-a³+2a²b+ab²
=2a²b
3、x(x-y)³+y(y-x)³
=x(x-y)(x-y)(x-y)+y(y-x)(y-x)(y-x)
=(x²-xy)(x²-2xy+y²)+(y²-xy)(y²-2xy+x²)
=(x²-xy+y²-xy)(x²-2xy+y²)
=(x²-2xy+y²)(x²-2xy+y²)
=x⁴-2x³y+x²y²-2x³y+4x²y²-2xy³+x²y²-2xy³+y⁴
=x⁴-4x³y+6x²y²-4xy³+y⁴

收起