1.把多项式1-x^2+2xy-y^2因式分解 2.(a+b)(a-b)-(b+a)因式分解 3.2x^2-4xy+2y^2 因式分解 4. 10^5-5*10^4+2*10^35.x^2-y^2-x+y 因式分解
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/04 00:55:56
![1.把多项式1-x^2+2xy-y^2因式分解 2.(a+b)(a-b)-(b+a)因式分解 3.2x^2-4xy+2y^2 因式分解 4. 10^5-5*10^4+2*10^35.x^2-y^2-x+y 因式分解](/uploads/image/z/7617511-55-1.jpg?t=1.%E6%8A%8A%E5%A4%9A%E9%A1%B9%E5%BC%8F1-x%5E2%2B2xy-y%5E2%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3+2.%EF%BC%88a%2Bb%EF%BC%89%EF%BC%88a-b%EF%BC%89-%EF%BC%88b%2Ba%EF%BC%89%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3+3.2x%EF%BC%BE2-4xy%2B2y%EF%BC%BE2%E3%80%80%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E3%80%80%E3%80%804.%E3%80%8010%EF%BC%BE5-5%2A10%EF%BC%BE4%2B2%2A10%EF%BC%BE35.x%5E2-y%5E2-x%2By+%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3)
1.把多项式1-x^2+2xy-y^2因式分解 2.(a+b)(a-b)-(b+a)因式分解 3.2x^2-4xy+2y^2 因式分解 4. 10^5-5*10^4+2*10^35.x^2-y^2-x+y 因式分解
1.把多项式1-x^2+2xy-y^2因式分解 2.(a+b)(a-b)-(b+a)因式分解
3.2x^2-4xy+2y^2 因式分解
4. 10^5-5*10^4+2*10^3
5.x^2-y^2-x+y 因式分解
1.把多项式1-x^2+2xy-y^2因式分解 2.(a+b)(a-b)-(b+a)因式分解 3.2x^2-4xy+2y^2 因式分解 4. 10^5-5*10^4+2*10^35.x^2-y^2-x+y 因式分解
1、1-x²+2xy-y²
=1-(x²-2xy+y²)
=1-(x-y)²
=(1-x+y)(1+x-y)
2、(a+b)(a-b)-(b+a)
=(a+b)(a-b-1)
3、2x²-4xy+2y²
=2(x²-2xy+y²)
=2(x-y)²
4、10^5-5*10^4+2*10^3
=10^3×(10²-5×10-2)
=1000×(100-52)
=1000×48
=48000
1.把多项式1-x^2+2xy-y^2因式分解 过程
1-x^2+2xy-y^2
=1-(x²-2xy+y²)
=1-(x-y)²
=(1+x-y)(1-x+y)
2.(a+b)(a-b)-(b+a)因式分解
=(a+b)(a-b)-(a+b)
=(a+b)(a-b-1)3 4 题呢3. 2x^2...
全部展开
1.把多项式1-x^2+2xy-y^2因式分解 过程
1-x^2+2xy-y^2
=1-(x²-2xy+y²)
=1-(x-y)²
=(1+x-y)(1-x+y)
2.(a+b)(a-b)-(b+a)因式分解
=(a+b)(a-b)-(a+b)
=(a+b)(a-b-1)
收起
1-x^2+2xy-y^2=1-(x^2-2xy+y^2)=1-(X-y)^2=(1+x-Y)(1-X+y)
.(a+b)(a-b)-(b+a)=.(a+b)[(a-b)-1]=(a+b)(a-b-1)