Thực hiện phép tính: x^2+2xy/x-y=3y^2-xy/y-x
Giải thích
x2+2xyx−y+3y2−xyy−x+2y2−3xyx−y=x2+2xyx−y+xy−3y2x−y+2y2−3xyx−y=x2+2xy+xy−3y2+2y2−3xyx+y=x2−y2x+y=x−y
x2+2xyx−y+3y2−xyy−x+2y2−3xyx−y=x2+2xyx−y+xy−3y2x−y+2y2−3xyx−y=x2+2xy+xy−3y2+2y2−3xyx+y=x2−y2x+y=x−y