check whether X - 2 is a factor of x3 - 5x3 + 4x - 3
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no x-2 is not a factor of x3-5x3+4x-3
as x-2=0
f(x)=(2)^3-5(2)^3+4(2)-3
8-40+8-3=27 as we do not get zero when 2 is substituted
so its not a factor
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