exam Maths Puzzle Numerical Ability

May I have some help with the following equation?

(x+1/x)^2 + 4(x+1/x)+ 3=0

Read Solution (Total 0)

exam Other Question

2. x+3y=-9 Question: Add -9 to both sides of Equation. Do this by adding -9 to the right side, and x+3y (Which equals -9) to the left side. The resulting equation should have only x as the variable. The y should have been eliminated. I am lost on what to do with is the given data. The question is;
Determine the vertex of the parabla: y=(x+2)^2
What is the axis of symmetry?

I know the axis of symmetry is h but how do I find the h?

Thank you for your time