exam Maths Puzzle Numerical Ability

Could someone help me with this problem?
Solve the following equation by factoring>
36x2=1 (The 2 is an exponent)
I have worked this problem out and cant seem to get the correct answer. Pleaqse help

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exam Other Question
An ideal curling ice temperature is between -5 and -4.5 degrees celcious. For a particular venue the temperatures are normally distributed.
Prior to the competion the mean tempera I am really stumped as to how to solve this inequality.
I would appreciate ANY answers. I just, for some reason, cannot work this one.

3a + 8/2 < 10

Thanks so much. :)