题目

阅读理解 Bright Side did some research on manyplaces throughout the world where you can buy a house for 1 dollar or for free! Roubaix, France If you like France, Roubaixlocated in the north of France is just for you. The local authorities want itto be populated and attractive. You can buy a small house in the industrialdistrict for just $1. The buyer is supposed to live in this house for 3 years. Buffalo. USA Buffalo offers whoeverqualifies to buy a house for $1. All you need is to be a lawful citizen of thecity and invest amount of money into its decoration. Doing this, theauthorities are小明遇到这样一个问题：已知： . 求证： .经过思考，小明的证明过程如下：∵，∴.∴.接下来，小明想：若把带人一元二次方程（a0），恰好得到.这说明一元二次方程有根，且一个根是.所以，根据一元二次方程根的判别式的知识易证： .根据上面的解题经验，小明模仿上面的题目自己编了一道类似的题目：已知： . 求证： .请你参考上面的方法，写出小明所编题目的证明过程.