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.
计算[(x-2y)2+(x-2y)(x+2y)+2x(2x-y)]÷2x.
[(x-2y)2+(x-2y)(x+2y)+2x(2x-y)]÷2x
=[x2-4xy+4y2+x2-4y2+4x2-2xy]÷2x
=[6x2-6xy]÷2x
=3x-3y.