X2+2XY+y2+x+y
问题描述:
X2+2XY+y2+x+y
等于什么?急用
答
X2+2XY+y2+x+y=(X+Y)2+(X+Y)=(X+Y)(X+Y+1)
X2+2XY+y2+x+y
等于什么?急用
X2+2XY+y2+x+y=(X+Y)2+(X+Y)=(X+Y)(X+Y+1)