## Algebra 2 Common Core

2.5$x^{2}$
x+.5$x^{2}$+2$x^{2}$-x The positive and negative x cancel out to get .5$x^{2}$+2$x^{2}$. Because these are like terms, they combine to get .5$x^{2}$+2$x^{2}$=2.5$x^{2}$.