exam Maths Puzzle Numerical Ability

I only have one problem left on my worksheet, and this is it, it is a hyperbola

16y^2-9x^2 +54x+64y=161

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exam Other Question

For what values of 'a' is the opposite of 'a' greater than 'a'? less than 'a'? equal to 'a'? Solve algebraically and check your potential solutions for;

squareroot x+2 -x=0