exam Maths Puzzle Numerical Ability

Solve equation for x using quadratic formula
4x^2+5x-2=0
If there is more than one solution, seperate with commas

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exam Other Question

Find the constant term that should be added to make the following expression a perfect-square trinomial.

x^2+7x
Write the ratio of 10 1/2 to 25 1/5 as a fraction in simplified form.