exam Maths Puzzle Numerical Ability

Express result in simplest form


5a - 12
Divided by
a^2 - 8a + 15

minus

3a - 2
Divided by
A^2 - 8a + 15

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exam Other Question
Help me please!! I dont understand how to do this with a fraction:

4a+3/4=19/4 find the domain of the function f(x)=1n(12x-48)