leetcode1037 valid boomerang

class Solution {
    public boolean isBoomerang(int[][] points) {
       int x1 = points[0][0];
       int y1 = points[0][1];
       int x2 = points[1][0];
       int y2 = points[1][1];
       int x3 = points[2][0];
       int y3 = points[2][1];
       if ((y1-y2)*(x2-x3)==(y2-y3)*(x1-x2) && (x2*y1-y2*x1)*(x3-x2)==(x2-x1)*(x3*y2-y3*x2)||(x1==x2&&y1==y2)||(x2==x3&&y2==y3)||(x1==x3&&y1==y3) ){   
           return false;
       }
       return true;
    }
}