化简(4x²-5xy)-(1/3y²+2x²)+2(3xy-1/4y²-1/12y²)
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![化简(4x²-5xy)-(1/3y²+2x²)+2(3xy-1/4y²-1/12y²)](/uploads/image/z/2831129-17-9.jpg?t=%E5%8C%96%E7%AE%80%EF%BC%884x%26%23178%3B%EF%BC%8D5xy%EF%BC%89%EF%BC%8D%EF%BC%881%2F3y%26%23178%3B%EF%BC%8B2x%26%23178%3B%EF%BC%89%EF%BC%8B2%EF%BC%883xy%EF%BC%8D1%2F4y%26%23178%3B%EF%BC%8D1%2F12y%26%23178%3B%EF%BC%89)
化简(4x²-5xy)-(1/3y²+2x²)+2(3xy-1/4y²-1/12y²)
化简(4x²-5xy)-(1/3y²+2x²)+2(3xy-1/4y²-1/12y²)
化简(4x²-5xy)-(1/3y²+2x²)+2(3xy-1/4y²-1/12y²)
(4x²-5xy)-(1/3y²+2x²)+2(3xy-1/4x²-1/12y²)
=4x²-5xy-1/3y²-2x²+6xy-1/2x²-1/6y²
=3/2x²+xy-1/2y²
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