## College Algebra (11th Edition)

Check factorization with FOIL: (5a + 3b)(a - 2b) = 5a(a) + 5a(-2b) + 3b(a) + 3b(-2b) = 5$a^{2}$ - 10ab + 3ab - 6$b^{2}$ = 5$a^{2}$ - 7ab - 6$b^{2}$