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i m again telling you dat try wid (x1-x2) n (y1-y2) instead of (x2-x1) n (y2-y1)...it will be more suitable for ur particular question...n equation will remain same in both the ways..so just try...

First of all the variables should not start with capital letters...(X1,X2)..and try with (x1-x2) and (y1-y2) instead of (x2-x1) and (y2-y1) respectively..all d best...and please let me know if my...

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first of all the variables should not start with capital letters...(X1,X2)..and try with (x1-x2) and (y1-y2) instead of (x2-x1) and (y2-y1) respectively..all d best...and please let me know...