[(2x+y)^2-(x+y)(x-4y)-5y^2]除以2x

问题描述:

[(2x+y)^2-(x+y)(x-4y)-5y^2]除以2x

原式=(4x²+4xy+y²-x²+3xy+4y²-5y²)÷2x
=(4x²+7xy)÷2x
=2x+3.5y