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Question: If x<sup>2</sup> – 3x + 2 be a factor of x<sup>4</sup> – px<sup>2</sup> + q, then (p, q) =...

If x2 – 3x + 2 be a factor of x4 – px2 + q, then (p, q) =

A

(3, 4)

B

(4, 5)

C

(4, 3)

D

(5, 4)

Answer

(5, 4)

Explanation

Solution

(x2 – 3x + 2) be factor of x4 – px2 + q

Ž x = 2,1 are roots,

\ 1 – p + q = 0

16 – 4p + q = 0

– + –

– 15 + 3 p = 0

Ž p = 5 and q = 4