exam Maths Puzzle Numerical Ability

i need help to solve this. I am completely lost

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exam Other Question

Can anyone help me with the following problem?
36x^2=1
I cant figure out how to work it. I have tried several different ways and keep coming up short. The ^2 is an exponent

Thank You y=[0,5][5,6][10,7.5][15,8][20.10][25,11][30,12.5]