book Maths Puzzle Numerical Ability

How do I solve this equation using the quadratic formula

3-4/x-2/x2=0

THREE - FOUR OVER X - TWO OVER X SQUARED = ZERO

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book Other Question

Two multiplied bythree to the third power equals 58 wiht no grouping symbols how do you get an answer of 4374 or 279,936 using grouping symboles?Otherwise known as parenthasis or Please!

help me out with this equation from the GRE ETS book .... I don't understand the result.

2^30 - 2^29
____________ = 2^28
2

THANK YOU SO MUCH!!!!!!!!!!!!