SOLUTION: let (x1, y1)=(-6,-3) and (x2,y2)=(-4,5). Find y2-y1/x2-x1 and y1-y2/x1-x2 are the results the same?

Algebra ->  Linear-equations -> SOLUTION: let (x1, y1)=(-6,-3) and (x2,y2)=(-4,5). Find y2-y1/x2-x1 and y1-y2/x1-x2 are the results the same?       Log On


   

Question 486001: let (x1, y1)=(-6,-3) and (x2,y2)=(-4,5). Find y2-y1/x2-x1 and y1-y2/x1-x2 are the results the same?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Better than that, let and

.

Factor -1 from :



Likewise:



So, by substitution:


.

But since

.

But

.

also. Therefore:



John

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