exam Maths Puzzle Numerical Ability

Use the ac test to determine if the following trinomial can be factored. If it can be factored, find the values of m and n.
3x^2 + 11x - 4

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exam Other Question
How do you find the value for k so that 9m^2-kn^2 will have the factors 3m+7n and 3m-7n If the ratio of areas of two similar solids is 25:36, what is the linear ratio?