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I f o n e f a c t o r o f 2 a^{4} + 5 a^{3} - 5 a + 2 i s (a - 1), w h a t i s o t h e r f a c t o r ?

2 a^{2} - a + 2

2 a^{2} - a - 2

a-2

a^{2} - 1

ANS : 1

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