整式运算 [(2X-3Y)²-(2X-Y)(2X+Y)]÷2Y (3X+2Y)(3X-2Y)-(2X-Y)²-(5X-Y)(X+2Y)
问题描述:
整式运算 [(2X-3Y)²-(2X-Y)(2X+Y)]÷2Y (3X+2Y)(3X-2Y)-(2X-Y)²-(5X-Y)(X+2Y)
答
[(2X-3Y)²-(2X-Y)(2X+Y)]÷2Y =(4X²-12XY+9Y²-4X²+Y²)÷2Y=(-12XY+10Y²)÷2Y=-6X+5Y(3X+2Y)(3X-2Y)-(2X-Y)²-(5X-Y)(X+2Y)=9X²-4Y²-4X²+4XY-Y²-5X&su...