exam Maths Puzzle Numerical Ability

What is the graph of the equation 6x2 - 24x - 5y2 - 10y - 11 = 0

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exam Other Question

What values for X must be excluded in the following fraction:

x+5
----
-1

A) 5
B) none
C) 0
D) -5

This problem has lost me, and the closest I can figure out is none need to be excluded. Is this correct? Given f(x) = 5x^ - 3x + 1, how would I find f(-2)?