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posted by sara on Sunday, May 27, 2012 at 9:37pm.

Why is x-1 not a factor of f(x)= 4x^3+8x^2+x-3?

if x-1 is a factor then f(1) has to be zero, but f(1) = 4 + 8 + 1 - 3≠ 0 So there!

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