问题 解答题

计算[(x-2y)2+(x-2y)(x+2y)+2x(2x-y)]÷2x.

答案

[(x-2y)2+(x-2y)(x+2y)+2x(2x-y)]÷2x

=[x2-4xy+4y2+x2-4y2+4x2-2xy]÷2x

=[6x2-6xy]÷2x

=3x-3y.

单项选择题 A1/A2型题
判断题