a2b2x2 + b2x - a2x - 1 = 0
b2x(a2x + 1) - 1(a2x + 1) = 0 taking b2x common from first two terms and - 1 from last two
(a2x + 1) (b2x - 1) = 0
(a2x + 1) = 0 or (b2x - 1) = 0
Hence the roots of equation are
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