设较小的正方形的边长是x㎝x²+(10-x)²=58x²+100-20x+x²=58x²-10x+21=0(x-3)(x-7)=0x1=3,x2=7当x=3时,10-x=7当x=7时,10-x=3 (舍去）3×4=12㎝7×4=28㎝剪出12㎝和28㎝的两段...