作业帮化简在求值-5y²+{2xy-[y²+x²-(1-y²)+2xy]+3x²｝其中x=3/2,y=-2
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 19:30:13
![化简在求值-5y²+{2xy-[y²+x²-(1-y²)+2xy]+3x²｝其中x=3/2,y=-2](/uploads/image/z/2681759-47-9.jpg?t=%E5%8C%96%E7%AE%80%E5%9C%A8%E6%B1%82%E5%80%BC-5y%26%23178%3B%2B%7B2xy-%5By%26%23178%3B%2Bx%26%23178%3B-%281-y%26%23178%3B%29%2B2xy%5D%2B3x%26%23178%3B%EF%BD%9D%E5%85%B6%E4%B8%ADx%3D3%2F2%2Cy%3D-2)
化简在求值-5y²+{2xy-[y²+x²-(1-y²)+2xy]+3x²｝其中x=3/2,y=-2
化简在求值-5y²+{2xy-[y²+x²-(1-y²)+2xy]+3x²｝其中x=3/2,y=-2
化简在求值-5y²+{2xy-[y²+x²-(1-y²)+2xy]+3x²｝其中x=3/2,y=-2
-5y²+{2xy-[y²+x²-(1-y²)+2xy]+3x²｝
=-5y²+{2xy-y²-x²+(1-y²)-2xy+3x²｝
=-5y²-2y²+2x²+1
=-7y²+2x²+1
=-7*(-2)²+2*(3/2)²+1
=-28+9/2+1
=-45/2