方程两边乘以x(x+1)得5x+2=3x移项,合并同类项得2x=-2系数化为1得x=-1经检验：x=-1是增根∴方程无解方程两边乘以(2x+5)(2x-5)得2x(2x+5)-2(2x-5)=(2x+5)(2x-5)去括号得4x²+10x-4x+10=4x²-25移项,合并同类项...