Let a = {1,3, a}, B = {1, a2-a + 1}, and a contain B, then the value of a is__ Given that x2 ∈ {1,0, X}, then the value of real number x is__ .

Let a = {1,3, a}, B = {1, a2-a + 1}, and a contain B, then the value of a is__ Given that x2 ∈ {1,0, X}, then the value of real number x is__ .

Let a (1,3, a {1,3, a}, B = {1, a2-a + 1}, and a contains B (1) a (1) a (a) (a) (a) (1,3, A-3, a {1,3, a {1,3, a {1,3, a {1,3, a}, B = {1, a2-a + 1, a2-a + 2-a-a + 1 = a-a-a + 1, and a includes B (1) a (1) a-a-a-a-a-a-a (1) A-A (a-a-a-a-1) we know that x2 ∈ {{{1,0, 0, X} x} x} x} x} x {x} x} x} x} x} x} x orx = - 1 x