one variable and systems of equations in two variables · 第 30 题

one variable and systems of equations in two variables · 原库模块 1 · Q30 原库参考解析

x -29 = (x - a )(x - 29)
Which of the following are solutions to the given equation, where is a constant and a > 30 ?
I.a
II.a + 1
III.29

解题思路