已知单项式M,N满足3x(M-5x)=6x^2y+N,求M,N.网上答案是N=-15x^2,M=2xy,但我觉得,为什么不是M=5x,N=-6x^2y?

问题描述:

已知单项式M,N满足3x(M-5x)=6x^2y+N,求M,N.
网上答案是N=-15x^2,M=2xy,但我觉得,为什么不是M=5x,N=-6x^2y?

n=15x^2,M=2XY