2/3X²-(-1/2X²)+(-2X²)等于多少?计算!

问题描述:

2/3X²-(-1/2X²)+(-2X²)等于多少?计算!

2/3X²-(-1/2X²)+(-2X²)
=2/3X²+1/2X²-2X²
=(2/3+1/2-2)X²
=0X²
=0