If x-a is a factor of x×x+2x+1 then find a

1.	If x-a is a factor of x×x+2x+1 then find a
Answer» Put x = ax×x+2x+1 = 0a × a + 2 (a) + 1 = 0a2 + 2a + 1= 0(a + 1) (a + 1) = 0a + 1 = 0a = -1\xa0

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