exam Maths Puzzle Numerical Ability

Show the graph for the quadratic function f(x)=(x-1)^2-2
Thank you for any help

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exam Other Question

Please help me.

Solve by completing the square.
2x^2+10x+11=0

I get-5+-sqrt23/2

not sure how I got there. Is it right? How should I work it out.
Find a polynomial fucntion of 5th degree given the following zeros.
-4, -2i, √6