is a factor of 
From the factor theorem, we have
(x – a) is the factor of f(x) if f(a) = 0
Here, we have
= 14 – 8 – 6
= 14 – 14
= 0
Therefore,
(x - 
) is a factor of (7x2 - 4√2x – 6)
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is a factor of 
