The roots of the equation x4-2x3+x=380 are

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5, -4, 1±5-32

-5, 4, -1±5-32

5, 4, -1±5-32

-5,-4, 1±5-32

answer is A.

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Detailed Solution

Given equation is x4-2x3+x-380=0Using remainder theorem we get(x-5)(x+4)(x2-x+19)=0x-5=0, x-4=0 and x2-x+19=0x=5, x=-4 and x=-1±5-32

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