Algebra Know-It-ALL

712 Worked-Out Solutions to Exercises: Chapters 21 to 29

8. See Fig. C-7. Each horizontal increment is 1/2 unit. Each vertical increment is 10 units.


9. See Table C-6, which shows selected values for the functions

y= 2 x^3 +x^2 +x− 4

and

y= 3 x^3 − 2 x^2 + 4 x− 5

Bold numerals indicate the real solution we found when we worked out Prob. 9 in Chap. 27.

10. See Fig. C-8. Each horizontal increment is 1 unit. Each vertical increment is 20 units.

x

y

(0,0)

Figure C-7 Illustration for the solution

to Prob. 8 in Chap. 28.

Table C-6. Solution to Prob. 9 in Chap. 28.

x 2 x^3 +x^2 +x− 4 3 x^3 − 2 x^2 + 4 x− 5

− 3 − 52 − 116

− 2 − 18 − 45

− 1 − 6 − 14

0 − 4 − 5

1 0 0

2 18 19

3 62 70

4 144 171