book Maths Puzzle Numerical Ability

Either perform the indicated operation or solve the equation, whichever is appropriate.

-5/-a^2-4 - 2/a^2-3a+2

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book Other Question

I am trying to find the anser to these equaisions...Please help
A(-2,8), B(10,-1)
X(-7,-1), F(-6,-1)
a+1/2 a+1/4 a+1/8 when a=2 please show