Chapter 5 - Section 5.3 - Introduction to Polynomials - Exercise Set - Page 363: 16

$(a)$ $-4$ $(b)$ $-6$

$x^{2}+3x-4$ $(a)$ $x=0$ Replace $x$ with $0$ and evaluate the indicated operations: $(0)^{2}+3(0)-4=-4$ $b)$ $x=-1$ Replace $x$ with $-1$ and evaluate the indicated operations: $(-1)^{2}+3(-1)-4=1-3-4=-6$