[x(x²y²-xy)-y(x²-x³y)]÷2x²y
展开全部
解:
a²x-4b²x
=x(a²-4b²)
=x(a+2b)(a-2b)
x+2﹙x+3﹚-﹙x+6﹚﹙x+1﹚
=x+2x+6-(x²+7x+6)
=3x+6-x²-7x-6
=-x²-4x
[x(x²y²-xy)-y(x²-x³y)]÷2x²y
=(x³y²-x²y-x²y+x³y²)÷2x²y
=(2x³y²-2x²y)÷2x²y
=xy-1
同学如有帮助,望采纳哈!~~~~~~~~~~
a²x-4b²x
=x(a²-4b²)
=x(a+2b)(a-2b)
x+2﹙x+3﹚-﹙x+6﹚﹙x+1﹚
=x+2x+6-(x²+7x+6)
=3x+6-x²-7x-6
=-x²-4x
[x(x²y²-xy)-y(x²-x³y)]÷2x²y
=(x³y²-x²y-x²y+x³y²)÷2x²y
=(2x³y²-2x²y)÷2x²y
=xy-1
同学如有帮助,望采纳哈!~~~~~~~~~~
追问
前两个呢,,,,,,,
追答
做完啦,你看是不是这个题目哈,希望能帮助到你哦!~
展开全部
[x(x²y²-xy)-y(x²-x³y)]÷2x²y
=[x²y(xy-1)-x²y(1-xy)]÷2x²y
=x²y[(xy-1)-(1-xy)]÷2x²y
=x²y[2(xy-1)]÷2x²y
=(xy-1)
2、是(x+2)(x+3)-(x+6)(x+1)吧
x^2+5x+6-x^2-7x-6
=-2x
3、x(a^2-4b^2)
=x(a+2b)(a-2b)
=[x²y(xy-1)-x²y(1-xy)]÷2x²y
=x²y[(xy-1)-(1-xy)]÷2x²y
=x²y[2(xy-1)]÷2x²y
=(xy-1)
2、是(x+2)(x+3)-(x+6)(x+1)吧
x^2+5x+6-x^2-7x-6
=-2x
3、x(a^2-4b^2)
=x(a+2b)(a-2b)
追问
不是啊,就是x+2﹙x+3﹚-﹙x+6﹚﹙x+1﹚
追答
哦,那就是
x+2x+6-x^2-7x-6
=-x^2-4x-6
=-(x^2+4x+4)-2
=-(x+2)^2-2
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询