a^2-5a+2
=(a-5/2)^2-17/4
=(a-5/2+√17/2)(a-5/2-√17/2)
猜你喜欢
- 1地球公转产生的地理意义是_.
- 2你们如何开展工作?How do you ____ _____ _____ your work?
- 3四下语文课文自然之道中自然之道是什么
- 4一元二次方程题..已知(a-1)x²-2ax+a=0.是一元二次方程,且有两个根,a=?
- 5一道小学五年级的数学鸡兔同笼的应用题.(要列表)
- 6Of the three girl,I find Millie is the _(clever).
- 7I often borrow books from ____________(they).
- 8什麽词能形容人的一生呢?
- 9Mr Zhang isn’t here. If he ____here, my parents would be happy.
- 10Nobody can answer the question,()()(反义疑问)