-7 x²y-5 x y²-4 x²+3 x y²谢谢合并同类项
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![-7 x²y-5 x y²-4 x²+3 x y²谢谢合并同类项](/uploads/image/z/1101446-62-6.jpg?t=-7+x%26%23178%3By-5+x+y%26%23178%3B-4+x%26%23178%3B%2B3+x+y%26%23178%3B%E8%B0%A2%E8%B0%A2%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9)
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-7 x²y-5 x y²-4 x²+3 x y²谢谢合并同类项
-7 x²y-5 x y²-4 x²+3 x y²
谢谢
合并同类项
-7 x²y-5 x y²-4 x²+3 x y²谢谢合并同类项
-7 x²y-5 x y²-4 x²+3 x y²
=-7 x²y+3 x y²-5 x y²-4 x²
=-7x²y-2xy²-4x²
-7 x²y-5 x y²-4 x²+3 x y²
=-7x^2y-2xy^2-4x^2
=-x(7xy+2y^2+4x)