Contact us
Choose a category below so we can get back to you as quickly as possible.
x的平方-4x-10=0 x的平方-4x+4-14=0 (x-2)²;=14 x-2=±√14 x=2±√14 在右上角點擊【評估】,然後就可以選擇【滿意,問題已經完美解决】了.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.