5(y-x)³·3x²(x-y)^6计算
问题描述:
5(y-x)³·3x²(x-y)^6计算
答
5(y-x)³·3x²(x-y)^6
=5(y-x)³·3x²(y-x)^6
=15x²(y-x)^9