Chapter 2 - Section 2.3 - Getting Information from the Graph of a Function - 2.3 Exercises - Page 180: 25

$a.\quad x=-2,\ x=1$ $b.\quad -2 \leq x \leq 1$

$a.$ Graph $y=x^{2}$ (red on the image) and $y=2-x$ (blue). The solution (if it exists) is the x-coordinate of the intersection. Solution: $x=-2,\ x=1$ $b.$ Using the graphs of part (a), we see that the red graph is below or intersecting the blue graph when $-2 \leq x \leq 1$