exam Maths Puzzle Numerical Ability

PLEASE TRY AND SOLVE THESE QUESTIONS WITH THE INFO GIVEN HERE, i AM COMPLETELY LOST, I WOULDN'T KNOW WHERE TO START, AND SOMETIMES I THINK I AM MADE TO FAIL AT MATH, BECAUSE I ALWA

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Complete the square and write the given equation in the standard form for the equation of a circle. then give the center and radius of the circle and sketch the graph.
x^2-6x+y^2+2y=6 Solve this quadratic equation by Extracting square roots:

1. 1=1/3x^2 and
2. x/4=9/x