Contact us
Choose a category below so we can get back to you as quickly as possible.
【1/2xy+y2+1】+【x2-1/2xy-2y2-1】 =1/2xy+y²+1+x²-1/2xy-2y²-1 =-y²+x²
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.