化简:[(2x-y)平方+(2x+y)(2x-y)-4x(x-y+1)]÷2x
问题描述:
化简:[(2x-y)平方+(2x+y)(2x-y)-4x(x-y+1)]÷2x
答
原始=(4x²-4xy+y²+4x²-y²-4x²+4xy-4x)÷2x
=(4x²-4x)÷2x
=4x²÷2x-4x÷2x
=2x-2