化简 1.(2x²—xyz)—2(x²—y³+xyz)
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![化简 1.(2x²—xyz)—2(x²—y³+xyz)](/uploads/image/z/13801795-43-5.jpg?t=%E5%8C%96%E7%AE%80+1.%EF%BC%882x%26%23178%3B%E2%80%94xyz%EF%BC%89%E2%80%942%EF%BC%88x%26%23178%3B%E2%80%94y%26%23179%3B%2Bxyz%EF%BC%89)
化简 1.(2x²—xyz)—2(x²—y³+xyz)
化简 1.(2x²—xyz)—2(x²—y³+xyz)
化简 1.(2x²—xyz)—2(x²—y³+xyz)
=2x²—xyz—2(x²—y³+xyz)
=2x²-xyz-2x²+2y³-2xyz
=2y³-3xyz
1.(2x²—xyz)—2(x²—y³+xyz)
=2x²-xyz-2x²+2y²-2xyz
=2y²-3xyz