作业帮先化简,后求值:[(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1.5
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 16:27:18
![先化简,后求值:[(x-y)²+(x+y)(x-y)]÷2x,其中x=3,y=1.5](/uploads/image/z/6863842-10-2.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%90%8E%E6%B1%82%E5%80%BC%3A%5B%28x-y%29%26%23178%3B%2B%28x%2By%29%28x-y%29%5D%C3%B72x%2C%E5%85%B6%E4%B8%ADx%3D3%2Cy%3D1.5)
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