{(x²+y²)-(x-y)+2y(x-y)}/4y
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/27 18:54:17
{(x²+y²)-(x-y)+2y(x-y)}/4y
{(x²+y²)-(x-y)+2y(x-y)}/4y
{(x²+y²)-(x-y)+2y(x-y)}/4y
{(x²+y²)-(x-y)²+2y(x-y)}/4y
=(x²+y²-x²+2xy-y²+2xy-2y²)/4y
=(4xy-2y²)/4y
=x-y/2
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来源:学生作业帮助网 编辑:作业帮 时间:2024/08/27 18:54:17
{(x²+y²)-(x-y)+2y(x-y)}/4y
{(x²+y²)-(x-y)+2y(x-y)}/4y
{(x²+y²)-(x-y)+2y(x-y)}/4y
{(x²+y²)-(x-y)²+2y(x-y)}/4y
=(x²+y²-x²+2xy-y²+2xy-2y²)/4y
=(4xy-2y²)/4y
=x-y/2