Condition for pair of straight line represent a pair of parallel lines?
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The condition for parallel lines must be
a₁/a₂ = b₁/b₂ ≠ c₁/c₂
where the pair of linear equations must be
a₁x + b₁y + c₁ = 0
a₂x + b₂y + c₂ = 0
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a₁/a₂ = b₁/b₂ ≠ c₁/c₂
where the pair of linear equations must be
a₁x + b₁y + c₁ = 0
a₂x + b₂y + c₂ = 0
_________________________________________________________
☺ ☺ ☺ Hope this Helps ☺ ☺ ☺
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