Rút gọn phân thức D=a^2+b^2-c62+2ab/a^2-b^2+c^2+2ac
Giải thích
D=a2+b2−c2+2aba2−b2+c2+2ac=a2+2ab+b2−c2a2+2ac+c2−b2=a+b2−c2a+c2−b2=a+b+ca+b−ca−b+ca+b+c=a+b−ca−b+c
D=a2+b2−c2+2aba2−b2+c2+2ac=a2+2ab+b2−c2a2+2ac+c2−b2=a+b2−c2a+c2−b2=a+b+ca+b−ca−b+ca+b+c=a+b−ca−b+c