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The point (-4,5) is vertex of a square a...

The point `(-4,5)` is vertex of a square and one of its diagonal is `7x-y+8=0.` The equation of other diagonal is `7x-y+23=0` `7y+x+=30` `7y+x=31` `x-7y=30` `x+7y+31=0`

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