已知单项式M,N满足等式3x(M-5x)=6x平方y3次方+n,求MN
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已知单项式M,N满足等式3x(M-5x)=6x平方y3次方+n,求MN
已知单项式M,N满足等式3x(M-5x)=6x平方y3次方+n,求MN
已知单项式M,N满足等式3x(M-5x)=6x平方y3次方+n,求MN
3x(M-5x)=6x平方y3次方+n
3xM-15x²=6x平方y3次方+n
3xM=6x平方y3次方
-15x²=n
所以
M=xy³
N=-15x²
3x(M-5x)=6x²y³+N
3xM-15x²=6x²y³+N
∴3xM=6x²y³;即,M=2xy³
N=-15x²
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