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

( 18 + 3$y^{2}$ ) ( 5-x)
90 + 15$y^{2}$ - 18x -3x$y^{2}$ ( 90 - 18 x ) + (15$y^{2}$ -3x$y^{2}$ ) group term 18( 5 - x) + 3$y^{2}$( 5 - x) factor out GCF from each grouping ( 18 + 3$y^{2}$ ) ( 5-x)