To multiply terms with the same base, multiply the coefficients and add the exponents. To divide terms with the same base, divide the coefficients and subtract the exponents. For example, 3x2 x 2x2 = 6x4 and \({8x^5 \over 4x^2} \) = 2x(5-2) = 2x3.
What is \( \frac{-9a^8}{7a^2} \)?
| -1\(\frac{2}{7}\)a\(\frac{1}{4}\) | |
| -1\(\frac{2}{7}\)a6 | |
| -1\(\frac{2}{7}\)a-6 | |
| -\(\frac{7}{9}\)a-6 |