Contact us
Choose a category below so we can get back to you as quickly as possible.
(x-3y+2z)^2
x的平方+9y的平方+4z的平方-6xy+4xz-12yz =(x-3y+2z)²; 利用:(a+b+c)²;=a²;+b²;+c²;+2ab+2bc+2ca做最簡單, 其餘的方法都有造作之嫌
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.