Question

How do we know the pair of linear equations are parallel, intersecting, coincident?plz reply fast i have a exam.

Answer 1

if a1/a2 is not equal to b1/b2 then the lines are interesting

if a1/a2 is equal to b1/b2 but not equal to c1/c2 then the lines are parallel

if a1/a2 is equal to b1/b2 and also equal to c1/c2 then the lines are coincident

here a1 and a2 are coefficients of x of the equations

b1 and b2 are coefficients of y

c1 and c2 are constants

hope it helps you....

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