if 2x+1=(√(111)), 2x^5 +2x^4 −53x^3 −57x+54=...?


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Question Number 7820 by ridwan balatif last updated on 17/Sep/16

$i f 2 x + 1 = \sqrt{111}, 2 x^{5} + 2 x^{4} - 53 x^{3} - 57 x + 54 = . . . ?$
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