先化简,再求值[(x-2y)^2+4(x+y)(x-y)]除以2x,其中x=2,y=1.5

2025-01-20 16:22:12
推荐回答(3个)
回答1:

[(x-2y)^2+4(x+y)(x-y)]除以2x
=(x²-4xy+4y²+4x²-4y²)÷2x
=(5x²-4xy)÷2x
=5x/2-2y
当x=2,y=1.5时
原式=5-3=2

回答2:

=(5X ²-4 XY)÷2x
=5x/2-2y
=2

回答3:

=(x^2+4y^2-4xy+4x^2-4y^2)/2x=(5x^2-4xy)/2x=(5x-4y)/2=2