In P2, find all real numbers a such that x - ax +1-a? is in the span of x -2x+1, x-1,and3x -2x-1. Oa = -2 or a =1 O a = -1 or 2 a can be any real number Oa = -2 or a=2 a =0

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Polynomials

Try substituting 1. You will get 6 and not 0. Try other real values also. What About -2? Let us check.