## College Algebra (11th Edition)

9$r^{2}$ - 4r + 19
1. Apply the distributive property. 2(3$r^{2}$ + 4r + 2) - 3(-$r^{2}$ + 4r - 5) = 6$r^{2}$ + 8r + 4 + 3$r^{2}$ - 12r + 15 2. Group like terms together. (6$r^{2}$ + 3$r^{2}$) + (8r - 12r) + (4 + 15) 3. Add like terms. 9$r^{2}$ - 4r + 19