book Maths Puzzle Numerical Ability

Factor completely
16x^2 - 2x - 3

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book Other Question

The second of three numbers is 8 more than the first, and the third number is 3 less than 3 times the first. If the third number is 15 more than the second, find the three numbers. Help....

Can you please help with simplify the rational expression to a single fraction
1-1/x-1/1+1/x+1

Thanks