find the complete set of values of a such that (x^2 -x)/1-ax attains all values
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Basic Algebra Identities
(a + b)2 = a2 + b2 + 2ab
(a – b)2 = a2 + b2 – 2ab
a2 – b2 = (a + b)(a – b)
a2 + b2 = (a + b)2 – 2ab = (a – b)2 + 2ab
a3 + b3 = (a + b)(a2 – ab + b2)
a3 – b3 = (a – b)(a2 + ab + b2)
(a + b)3 = a3 + 3ab(a + b) + b3
(a – b)3 = a3 – 3ab(a – b) – b3
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