Contact us
Choose a category below so we can get back to you as quickly as possible.
원 식=[(a+b)+(a-b)][(a+b)-(a-b)]=4ab,a=2725,b=254 시,원 식=4×2275×2544=23.
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.