Chapter 5 - Section 5.3 - Introduction to Polynomials - Exercise Set - Page 363: 17

$(a)$ $-15$ $(b)$ $-10$

$-x^{3}+4x^{2}-15$ $(a)$ $x=0$ Replace $x$ with $0$ and evaluate the indicated operations: $-(0)^{3}+4(0)^{2}-15=-15$ $b)$ $x=-1$ Replace $x$ with $-1$ and evaluate the indicated operations: $-(-1)^{3}+4(-1)^{2}-15=1+4-15=-10$