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

P(x) = 5$x^{4}$ - 3$x^{2}$ + 7 ///Plug in -1 for x everywhere P(-1) = 5($-1^{4}$) - 3($-1^{2}$) + 7 P(-1) = 5(1) - 3(1) + 7 P(-1) = 5 - 3 + 7 P(-1) = 9