单项式5a2b,3ab2,-6a2b的和与-4a2b的差是_.
问题描述:
单项式5a2b,3ab2,-6a2b的和与-4a2b的差是______.
答
5a2b+3ab2-6a2b-(-4a2b)=-5a2b+3ab2,
故答案为:-5a2b+3ab2.