exam Maths Puzzle Numerical Ability

For the quadratic function Q(x)=x^2+5x-36, determine the exact value of the minimum.

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exam Other Question

Express both in terms of x

1. ln(x) = 2

what I thought was x = e^2 but that seemed too simple

2. tan^-1 x = 1 4 times a number, decreased by 2, is 26. Find the number.