book Maths Puzzle Numerical Ability

Let y = sqrt((x+1)(x+3)/(x+2).)Find all the real values of x for which y takes real
values.

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book Other Question

A survey of 2,000 people showed 1,620 favored the construction of a new fire station. What percent of the people surveyed did not favor the construction of the fire station? Tell whether the x-value is a soultion of the equation.

ln x = 3, x = 3e