find the value of a, if ( x-a) is a factor of x3-a2 x+x+2
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Let f (x) =x³-a²x+x+2
Put x-a=0
X=a
Let f (x) =a³-a²×a+a+2
=a³-a³+a+2
Or a+2=0
A= - 2
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