Given that a and B are two of the equations x2 + (m-2) x + 1 = 0 about X, then the value of (1 + Ma + A2) (1 + MB + B2) is______ ．

∵ A and B are two of the equations x2 + (m-2) x + 1 = 0, ∵ A2 + (m-2) a + 1 = 0, B2 + (m-2) B + 1 = 0, ab = 1, ∵ 1 + Ma + A2 = 2A, 1 + MB + B2 = 2B, ∵ (1 + Ma + A2) (1 + MB + B2) = 2A, 2b = 4AB = 4

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