book Maths Puzzle Numerical Ability

Check my Work Please!
Rational Expression

(x2 * x+2) / x
_
5 2 30

(-18x^2)
______
(x+2)

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book Other Question

write each expression as a sum or difference of logarithms. express powers as factors.

ln(x^4sqrt(x^2+1))
How can I write a complete solution for this problem?

The sum of two numbers is 4, and their product is -32. Find the numbers.