Answer:
[tex](6 {y}^{2} + y - 8) + (8 {y}^{2} - y - 9) = 14 {y}^{2} - 17[/tex]
Step-by-step explanation:
[tex](6 {y}^{2} + y - 8) + (8 {y}^{2} - y - 9) \\ \\ 14 {y}^{2} + 0 - 17 \\ \\ = 14 {y}^{2} - 17[/tex]
