将0.25-x和0.25都乘以2,所以等式两边大小不变得(2.25+3x)³/[(0.5-2x)²(0.5-2x)]=(0.75)³/[(0.5)²(0.5)].式子合并得(2.25+3x)³/(0.5-2x)3=(0.75)³/[(0.5)3,所以再合并得(2.25+3x)/(0.5...