exam Maths Puzzle Numerical Ability

what is the equation of the axis of symmetry of the graph y=x^2-4x+1?

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Can you please take the time to help me solve this problem: Find the domain of f(x) if f(x) = [ x / (x2 - x - 2) ].

Thank you Ok, the polynomial f(x) divided x-3 results in a quotient of x^2+3x-5 with a remainder of 2. What is f(3)?