由题意：(3/4)x+2=(1/4)x-3（两根同为正或负）,或 (3/4)x+2=-(1/4)x+3（两根异号）；前一式解得 x=-10,(3/4)x+2=(3/4)*(-10)+2=-11/2,(-11/2)²=121/4……所求正数为 121/4；由后一式解得 x=1；(3/4)x+2=(3/4)*1...