若单项式-3A^2-MB与B^N+1A^2是同类项,求代数式M^2-(-3M+3N^2)+2N^2

问题描述:

若单项式-3A^2-MB与B^N+1A^2是同类项,求代数式M^2-(-3M+3N^2)+2N^2