if line 3x-ay-1=0 is parallel to (a+2)x-y+3=0 find- a
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Given that,
3x-ay-1=0 and (a+2)x-y+3=0
To which the equations are parallel
a1/a2=b1/b2≠c1/c2
3/a+2=-a/-1
3(-1)=-a(a+2)
-3=-a²-2a
a²+2a-3=0
a²+3a-a-3=0
a(a+3)-1(a+3)
(a+3) (a-1)
a=-3 or a=1
when a=-3 or 1 the given equations represent parallel lines.
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