问题
填空题
[(2x+y)2-y(y+4x)-8x]÷2x=______.
答案
[(2x+y)2-y(y+4x)-8x]÷2x,
=(4x2+4xy+y2-y2-4xy-8x)÷2x,
=(4x2-8x)÷2x,
=2x-4.
[(2x+y)2-y(y+4x)-8x]÷2x=______.
[(2x+y)2-y(y+4x)-8x]÷2x,
=(4x2+4xy+y2-y2-4xy-8x)÷2x,
=(4x2-8x)÷2x,
=2x-4.