Question

a1x +b1y +c1 = 0
and a2x + b2y +c2 =0
where a1, b1,c1, a2, b2, c2 are all real number
& a1 square +b1 square is not eual to 0 ,
a2 square +b2 square is not equal 0 is called a ​----------
plz answer guys
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Answer 1

Answer:

parallel lines bcz there is no solutions