exam Maths Puzzle Numerical Ability

Okay!! Well I kind of get what is going on but I can't get passed a certain poit here is the question and what I have so far. Pleasle tell me what I am doing wrong and i need help

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exam Other Question

How would you solve this equation?

x(x+1/3)(2x-3)=0
Can you help??? Simply the following:
(3a^2)^-2

and
6x^-2 divided by x^-3

Thanks for helping!!