Two sides of an isosceles triangle are given by the equations `7x-y+3=0 and x+y-3=0` and its third side passes through the point `(1,-1)dot` Determine the equation of the third side.

Explanation

Let us suppose that `/_\ABC` is an isosceles triangle with its sides `AB` and `AC` equal.

So, `AB=AC` and `/_ABC=/_ACB`



Now, as given, the equations of two equal sides of the isosceles triangle `/_\ABC` are ,

`7x−y+3=0`

and `x+y−3=0`

Then, the above two equations can be simplified as,

`7x−y+3=0`

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