问题
计算题
计算[(x﹣2y)2+(x﹣2y)(x+2y)+2x(2x﹣y)]÷2x
答案
解:[(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
解:[(x﹣2y)2+(x﹣2y)(x+2y)+2x(2x﹣y)]÷2x
=[x2﹣4xy+4y2+x2﹣4y2+4x2﹣2xy]÷2x
=[6x2﹣6xy]÷2x
=3x﹣3y.