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Thomas D. Dean
Mar 23, 2013, 11:54:33 PM3/23/13
to
restart;with(geometry):
pointpoint:= proc(p1,p2)
c:=coordinates(p1);
y-c[2]=slope(p1,p2)*(x-c[1])
end proc;
assume(x1<>x2, y1<>y2);
point(p1,x1,y1):point(p2,x2,y2):
pointpoint(p1,p2);
%*(x2-x1);
How do I fix the rhs of the result to get the '-' inside the first ()?
(x2~ - x1~) (y - y1~) = -(-y2~ + y1~) (x - x1~)
But, I want
(x2~ - x1~) (y - y1~) = (y2~ - y1~) (x - x1~)
Tom Dean
pointpoint:= proc(p1,p2)
c:=coordinates(p1);
y-c[2]=slope(p1,p2)*(x-c[1])
end proc;
assume(x1<>x2, y1<>y2);
point(p1,x1,y1):point(p2,x2,y2):
pointpoint(p1,p2);
%*(x2-x1);
How do I fix the rhs of the result to get the '-' inside the first ()?
(x2~ - x1~) (y - y1~) = -(-y2~ + y1~) (x - x1~)
But, I want
(x2~ - x1~) (y - y1~) = (y2~ - y1~) (x - x1~)
Tom Dean
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