exam Maths Puzzle Numerical Ability

I have asked a couple of questions can some one please answer them i not sure why no one has not answered them PLEASE HELP ME PLEASE I TRULY NEED SOME HELP THANK YOU THANK YOU!!!!!

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exam Other Question

Write three quadratic equations, with a,b and c (coefficients of x^2,x and the constant) as;
1. Integars
2. Rational numbers
3. Irrational numbers
simplify

3
over
4
over
4
over
5
A)16/15
B)15/16
C)5/3
D)3/5