Negative intergers as exponents: Expressing using positive exponents, if possible simplify

Question

^{5a-7 b4}

Answer 1

Remember that button on your calculator that has x^-1 on it?

 

A negative exponent means to put that number under 1.

 

An example:

5^-1 = 1/5 

5^-2 = 1/5² = 1/25

etc.