Factorise a²b²x²+b²x-a²x-1=0
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a²b²x²+b²x-a²x-1=0
It's factors
b²x(a²x+1)-1(a²x+1) = 0
(b²x-1)(a²x+1) = 0
x = 1/b² or x = -1/a²
∴ (b²x-1) and (a²x+1) are it's factors.
1/b² and -1/a² are it's zeros.
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