exam Maths Puzzle Numerical Ability

PLEASE HELP!!

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p^-3/4m^2 (2p^2/m^-2 - 8m^-2/a^2b^3p)

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exam Other Question

the problem is as follows=== Identify all asymptotes, the y intercept, all x intercepts for the graph f(x). Then scetch the graph.

f(X)= 2x^2-5x-3
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x^2-9

Thanks for your help How would you simplify this in exponential form, using only positive exponents,assuming all variables represent nonzero numbers?

a^-1b^2c^-4/a^2b^-2c^5