Contact us
Choose a category below so we can get back to you as quickly as possible.
原式=ab(a+2ab+b),=ab(a+b+2ab).∵a+b=23,ab=2∴原式=2×(23+2×2)=283.
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.