exam Maths Puzzle Numerical Ability

If two sides of a triangle are equal, the angles opposite these sides are unequal and the greater angle lies opposite the greater side, and conversely

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exam Other Question

I'm having difficulty in setting up this problem. I'm not sure if I should use a generating function or binomial coefficients. I'm thinking it would be easier to solve with a gen Solve the equation below.

Please enter your answer as two numbers, separated by a comma.
x(2x-5)=18