## Introductory Algebra for College Students (7th Edition)

10$x^{2}$ - 12x
(7$x^{y}$ - 11x) + (3$x^{2}$-x) The like terms are 7$x^{2}$ and 3$x^{2}$ containing the same variable to the same power($x^{2}$), as well as -11x and -x (both containing x). We begin by grouping these pairs of like terms. ( 7$x^{2}$ + 3$x^{2}$)+ (-11x -x) = 10$x^{2}$ + (- 12x) =10$x^{2}$ - 12x