Page 740 - Basic College Mathematics with Early Integers

B.2 Exercise Set FOR EXTRA HELP

Objective Multiply. See Examples 1 through 4.

1. x 5 # x 9 2. y 4 # y 7 3. a 6 # a 4. b b 8
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5. 3z 3 # 5z 2 6. 8r 2 # 2r 15 7. -4x 10x 8. -9y 3y

2 3 4 4 3 7 4 5 3 6 2 9
9. 1-5x y 21-5x y2 10. 1-2xy 21-6x y 2 11. 17ab214a b 2 12. 13a b 2112a b 2

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13. 2x 3x 7x 14. 4y 3y 5y 15. a 4a 11 # 3a 5 16. b 7b 10 # 5b 8
Objectives Mixed Practice Simplify. See Examples 1 through 9.
5 3 4 7 2 10 6 9
17. 1x 2 18. 1y 2 19. 1z 2 20. 1a 2
7 6 2 10 2 9 5 3 4 5
21. 1b 2 1b 2 22. 1x 2 # 1x 2 23. 13a2 24. 12y2
11 8 3 7 4 8 3 6 2 4 3 2
25. 1a b 2 26. 1x y 2 27. 111x y 2 28. 19a b 2
7 3 2 4 3 3 5 2 4 4 3 3
29. 1-3y212y 2 30. 1-2x215x 2 31. 14xy2 12x y 2 32. 12xy2 13x y 2

Concept Extensions

Find the area of each figure.

33. 34. 9y centimeters
2
Square 4x 6 9y
inches Rectangle
centimeters
35. 36.
30y 12
4ab feet Parallelogram
meters

15
50y feet
3 4
6a b meters
#
(Hint: Area = base height )
Multiply and simplify.

7 6 3 6 3 4 14 6 7 20 19 5
37. 114a b 2 19a b 2 38. 15x y 2 13x y 2
10 5 14 4
39. 18.1x 2 40. 14.6a 2
3
41. In your own words, explain why x 2 # x = x 5 42. 1x y 2 Copyright 2012 Pearson Education, Inc.
90 72 3
2 3 6
and 1x 2 = x .
20 10 5 5 9 12 3
43. 1a b c 2 1a b 2
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