## Algebra: A Combined Approach (4th Edition)

( 3$x^{2}$ + 5x - 8 ) + ( 5 $x^{2}$ + 9x +12 ) - ( 8$x^{2}$ -14) 3$x^{2}$ + 5x - 8 + 5$x^{2}$ + 9x + 12 -8$x^{2}$ + 14 3$x^{2}$ + 5$x^{2}$ -8$x^{2}$ + 5x + 9x -8 + 12 + 14 combine like terms 14x + 18