i think that there is a better way , we see that when we replace x with y in any eqn. we get the other one which means that the st. line intersect at y=x line as they are symmeteric about it.
Put y=x in any line to easily get y=x=-c/a+b
daksh
Last Activity: 10 Years ago
how you can say that they intersect at y=x , its for sure that they are symmmetric but i think its only a special case that they intersect at y=x.
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