先化简,后求值:[(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1.5

先化简,后求值:[(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1.5
先化简,后求值:[(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1.5

先化简,后求值:[(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1.5
一会上手写图 稍等

=(x^2-2xy+y^2+x^2-xy+xy-y^2)}/2x
=(2x^2-2xy)/2x
=x-y
所以3-1.5=1.5