１ 题 当ａ、ｂ为何值时，　　　　　　是同类二次根式？ 解 依题意，有 解答错了！错在哪里？ 同类二次根式的定义：几个二次根式化成最简二次根式以后，如果被开方数相同，这几个二次根式就叫做同类二次根式。由此可见，不仅被开方数相同的二次根式是同类二次根式，而被开方? Question 1 When the values ​​of a and b are the same type of secondary roots? According to the meaning of the solution, there is a wrong answer! Where is wrong? The definition of the same kind of secondary roots: After several secondary roots are converted into the simplest secondary roots, if the number of square roots is the same, these secondary roots are called secondary roots of the same type. It can be seen from this that not only the secondary roots with the same number of open squares are the same secondary roots, but they are prescribing?