Contact us
Choose a category below so we can get back to you as quickly as possible.
36x的平方=9(x+1)的平方 36x的平方-9(x+1)的平方=0 9[4x^2-(x+1)^2]=0 9(2x-x-1)(2x+x+1)=0 9(x-1)(3x+1)=0 x1=1 x2=-1/3
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.