Exponents and Notations

Question 1

Negative exponent

Answer 1

When there is a negative exponent:
1. put the whole number as a denominator with a positive exponent.
2. Put 1 as the numerator.
3. Solve the exponent, leave as a fraction.

Question 2

subtracting polynomials

Answer 2

multiply each number meant to be subtracted by -1.