﹙2x²y+3xy²﹚-﹙6x²y-3xy²﹚
问题描述:
﹙2x²y+3xy²﹚-﹙6x²y-3xy²﹚
答
﹙2x²y+3xy²﹚-﹙6x²y-3xy²﹚
=2x²y+3xy²-6x²y+3xy²
=-4x²y+6xy²