It is known that the domain of the function f (x) = x ^ 2-ax + 3 is the domain of (2,4) when a belongs to (2,6)

It is known that the domain of the function f (x) = x ^ 2-ax + 3 is the domain of (2,4) when a belongs to (2,6)

Segment:
A belongs to (2,4) range (7-2a, 19-4a)
A belongs to [4,6] range (3-A * * 2 / 4,19-4a)
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okl.