# (x-1) is a

From the factor theorem, we have

(x – 1) is the factor of f(x) if f(1) = 0

Here, we have

f(1) = 2 × 14 + 9 × 13 + 6 × 12 – 11 × 1 – 6

= 2 + 9 + 6 – 11 – 6

= 17 – 17

= 0

Therefore,

(x – 1) is the factor of (2x4 + 9x3 + 6x2 – 11x – 6)

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