## College Algebra (11th Edition)

64$s^{2}$ - 9$t^{2}$
1. Product of the sum and difference of two terms: (8s - 3t)(8s + 3t) = $(8s)^{2}$ - $(3t)^{2}$ 2. Solve exponents with power rules 64$s^{2}$ - 9$t^{2}$