Answer
2$y^{2}$ + y - 10
Work Step by Step
the translation is
(7$y^{2}$ + 9y -8 ) - ( 5$y^{2}$ + 8y + 2)
7$y^{2}$ + 9y -8 + (- 5$y^{2}$ - 8y -2 ) add the opposite
7$y^{2}$ + 9y -8 - 5$y^{2}$ - 8y -2
7$y^{2}$ - 5$y^{2}$ + 9y - 8y - 8 -2 combine like terms
2$y^{2}$ + y - 10 simplfy