exam Maths Puzzle Numerical Ability

Please show me how to solve my homework question. thanks.

Y^2-36/y^2-4 multiplied by y^2+6y+8/y^2-2y-24

the choices are

A.) y+6/y-2 B.) y-6/y+2 c.) y+2/y+6 D.) y-2/y-6

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exam Other Question

The current price of a litre of gasoline is $0.92 and is expected to increase at a rate of 12% every 6 months. The price of a litre of diesel is $0.80 and is expected to increase a Determine which two equations represent parallel lines.
a) y = -6x + 3
b) y = 6x + 3
c) y = x + 3
d) y = -6x + 5

Thank you very much!