Show that 5-4x-x2 can never be greater than 9. Completing Square Form.

Plz kindly show it step by step

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h