约分:-20a²b分之5ab;x²-4分之x²-2x;x+y分之x³-xy²;x²-2x+1分之1-x²
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 12:51:10
![约分:-20a²b分之5ab;x²-4分之x²-2x;x+y分之x³-xy²;x²-2x+1分之1-x²](/uploads/image/z/1345029-69-9.jpg?t=%E7%BA%A6%E5%88%86%EF%BC%9A-20a%26%23178%3Bb%E5%88%86%E4%B9%8B5ab%EF%BC%9Bx%26%23178%3B-4%E5%88%86%E4%B9%8Bx%26%23178%3B-2x%3Bx%2By%E5%88%86%E4%B9%8Bx%26%23179%3B-xy%26%23178%3B%EF%BC%9Bx%26%23178%3B-2x%2B1%E5%88%86%E4%B9%8B1-x%26%23178%3B)
约分:-20a²b分之5ab;x²-4分之x²-2x;x+y分之x³-xy²;x²-2x+1分之1-x²
约分:-20a²b分之5ab;x²-4分之x²-2x;x+y分之x³-xy²;
x²-2x+1分之1-x²
约分:-20a²b分之5ab;x²-4分之x²-2x;x+y分之x³-xy²;x²-2x+1分之1-x²
-20a²b分之5ab;5ab/-20a²b=-1/(4a)
x²-4分之x²-2x; (x²-2x)/(x²-4)=(x(x-2))/((x+2)(x-2)=x/(x+2)
x+y分之x³-xy² (x³-xy²)/(x+y)=(x(x+y)(x-y))/(x+y)=x(x-y)
x²-2x+1分之1-x² (1-x²)/(x²-2x+1)=((1+x)(1-x))/(1-x)²=(1+x)/(1-x)