已知单项式M,N满足3x(M-5x)=6x²y²+N,求MN.老师说的是:3xM-15x²=6x²y²+N,3xM=6x²y²,-15x²=N,我不知道为什么,好的有加悬赏.
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![已知单项式M,N满足3x(M-5x)=6x²y²+N,求MN.老师说的是:3xM-15x²=6x²y²+N,3xM=6x²y²,-15x²=N,我不知道为什么,好的有加悬赏.](/uploads/image/z/1162982-38-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%8D%95%E9%A1%B9%E5%BC%8FM%2CN%E6%BB%A1%E8%B6%B33x%28M-5x%EF%BC%89%3D6x%26%23178%3By%26%23178%3B%2BN%2C%E6%B1%82MN.%E8%80%81%E5%B8%88%E8%AF%B4%E7%9A%84%E6%98%AF%EF%BC%9A3xM-15x%26%23178%3B%3D6x%26%23178%3By%26%23178%3B%2BN%2C3xM%3D6x%26%23178%3By%26%23178%3B%2C-15x%26%23178%3B%3DN%2C%E6%88%91%E4%B8%8D%E7%9F%A5%E9%81%93%E4%B8%BA%E4%BB%80%E4%B9%88%2C%E5%A5%BD%E7%9A%84%E6%9C%89%E5%8A%A0%E6%82%AC%E8%B5%8F.)
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已知单项式M,N满足3x(M-5x)=6x²y²+N,求MN.老师说的是:3xM-15x²=6x²y²+N,3xM=6x²y²,-15x²=N,我不知道为什么,好的有加悬赏.
已知单项式M,N满足3x(M-5x)=6x²y²+N,求MN.
老师说的是:3xM-15x²=6x²y²+N,3xM=6x²y²,-15x²=N,我不知道为什么,好的有加悬赏.
已知单项式M,N满足3x(M-5x)=6x²y²+N,求MN.老师说的是:3xM-15x²=6x²y²+N,3xM=6x²y²,-15x²=N,我不知道为什么,好的有加悬赏.
∵M、N都是单项式
∴3xM也是单项式
∵3xM-15x^2=6x^2y^2+N
又∵-15x^2≠6x^2y^2
∴3xM=6x^2y^2,
N=-15x^2
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