论文部分内容阅读
解无理方程时,由于方程两边进行了平方,扩大了未知数取值范围,可能会引起增根,所以解无理方程必须验根.课本介绍
When solving an irrational equation, because the squares are squared on both sides of the equation, the range of unknown values is enlarged, which may cause rooting. Therefore, the solution of irrational equation must be rooted.