If x = - 2 is the root of the equation: 2x2-ax-b = 3-2x, then 3-4A + 2B=______ .

If x = - 2 is the root of the equation: 2x2-ax-b = 3-2x, then 3-4A + 2B=______ .

Substituting x = - 2 into the equation: 8 + 2a-b = 3 + 4, that is, 2a-b = - 1, then 3-4A + 2B = 3-2 (2a-b) = 3 + 2 = 5