【分解因式,必须要过程】-7x³y-14x²y²
【分解因式,必须要过程】-7x³y-14x²y²7x³-63x3a²-12b²6(m-n)³-3(n...
【分解因式,必须要过程】
-7x³y-14x²y²
7x³-63x
3a²-12b²
6(m-n)³-3(n-m)²
3a³-3ab²
-2a³b+4a²b²-2ab³
2(x-y)²-6(x-y) 展开
-7x³y-14x²y²
7x³-63x
3a²-12b²
6(m-n)³-3(n-m)²
3a³-3ab²
-2a³b+4a²b²-2ab³
2(x-y)²-6(x-y) 展开
1个回答
展开全部
-7x³y-14x²y²=-7x²y(x+2y)
7x³-63x=7x(x²-9)=7x(x+3)(x-3)
3a²-12b²=3(a²-4b²)=3(a+2b)(a-2b)
6(m-n)³-3(n-m)²=3(m-n)²[2(m-n)-1]=3(m-n)²(2m-2n-1)
3a³-3ab²=3a(a²-b²)=3a(a+b)(a-b)
-2a³b+4a²b²-2ab³=-2ab(a²-2ab+b²)=-2ab(a-b)²
2(x-y)²-6(x-y)=2(x-y)[(x-y)-3]=2(x-y)(x-y-3)
7x³-63x=7x(x²-9)=7x(x+3)(x-3)
3a²-12b²=3(a²-4b²)=3(a+2b)(a-2b)
6(m-n)³-3(n-m)²=3(m-n)²[2(m-n)-1]=3(m-n)²(2m-2n-1)
3a³-3ab²=3a(a²-b²)=3a(a+b)(a-b)
-2a³b+4a²b²-2ab³=-2ab(a²-2ab+b²)=-2ab(a-b)²
2(x-y)²-6(x-y)=2(x-y)[(x-y)-3]=2(x-y)(x-y-3)
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