Posted by TUHITUHI on Thursday, October 4, 2012 at 12:06pm.
let f(x) = x^3 - 2ax^2 + ax - 1
if x-2 is a factor, then f(2) = 0
f(2) = 8 -8a + 2a - 1 = 0
-6a = -7
a = 7/6
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