exam Maths Puzzle Numerical Ability

How to simplify this expression?
(2m+3n/2m^2-5mn-12n^2)/(2m^2-7mn-4n^2/m^2-8mn+16n^2)

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exam Other Question

give the discriminant and use it to determine the number and type of solutions of the equation

3x^2 = 4x-5
Loan principal = $32669.95
APR = 9.0%
Payments = $671.71
Financed for 5 years with equal installments.

What is the total interest to be paid.

Don