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

5$x^{2}$ + 2$y^{2}$
( 5$x^{2}$ + 4 ) - ( -2$y^{2}$ + 4 ) 5$x^{2}$ + 4 + 2$y^{2}$ - 4 5$x^{2}$ + 2 $y^{2}$ simplify