Express the following with a positive index:
$p^{-2}$p−2
$a^{-9}$a−9
$\frac{1}{a^{-x}}$1a−x.
Write $\frac{a^{-n}}{b^{-m}}$a−nb−m without negative exponents.
simplifies algebraic fractions, and expands and factorises quadratic expressions
applies index laws to operate with algebraic expressions involving integer indices