已知A=2A^2+3ab-b^2,B=-1/2ab,C=3/2a^3b^3-1/4a^2b^4.求2A乘B^2-C
问题描述:
已知A=2A^2+3ab-b^2,B=-1/2ab,C=3/2a^3b^3-1/4a^2b^4.求2A乘B^2-C
答
A=2a²+3ab-b²B=-½abC=(3/2)a³b³-¼a²b⁴2AB²-C=2(2a²+3ab-b²)(-½ab)²-[(3/2)a³b³-¼a²b⁴]=a⁴b²+(3/2)a³...