exam Maths Puzzle Numerical Ability

(1)proof that the contrapositive of the statement is logically equivalant to the statement.
(2)Proof also that the converse statement is logically equivalant to the inverse of the statement.

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Please help me solve (divide) this equation in factored form:

8a^2-6a-9/6a^2-5a-6/4a^2+11a+6/9a^2+12a+4 I need help with this problem, please. It is:

(3x + 2x^3 + 114)/(x+4)