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Math 90 Ch. 5 Practice
Name___________________
2
2
3. Simplify: (3x3y)2(3xy2)3
3
5. Simplify, write answer with positive exponents: (4x4y)0
1. Simplify: (-3)3
2. Simplify:
4. Simplify: w-2
6. Subtract (5y2 – 2y + 3) – (6y2 + 2y – 8)
7 10 5 21 10
3 10 12
7. Simplify and write in scientific notation:
6
1
x 6 y3
8. Simplify, write answer with positive exponents:
x 3y 4
9. Write 0.00112 in scientific notation.
10. Write 2.63
8 x 6 yz 2
11. Simplify, write answer with positive exponents:
24 x 3 y 7
14b7
7b
12. Simplify, write answer with positive exponents:
13. Find the value of 3x2 – 2x + 4 when x is –3.
104 in expanded form.
30b12
3b6
14. Multiply: 5x4y(7x2 + 3xy – 4y2)
15. Multiply: (2x + 3)(x2 – 4x + 2)
1
1
3x
3
4
18. Multiply: (2y + 1)(3y2 – 5y – 3)
17. Multiply: (2x – 5y)(3x – 2y)
20. By formula: (x2 + 2)(x2 – 2)
22. Divide: 8x4 + 16x3 – 12x2 by 4x2
6 x 3 7 x 2 11x 12
23. Divide:
2x 3
6
25. Multiply: (x – 4)(x8 + 4)
21. Simplify: (3y + 2)2 – (3y – 2)2
26.
27. (2a3b-1)-4
28.
16. Multiply:
4x
19. By formula: ( a + 5)2
5x 2
2x 4
x 3
By formula: (8a2 + 3)2
24. Divide:
ANSWERS
4
9
x3
8.
y7
1. –27
2
7. 4.9 * 10
6
12. –8b
2
16. 12x 4
20. x – 4
3. 243x y
1
12
-3
5. 1
10. 26,300
11.
6
5 2
4 3
2
3
2
18. 6y - 7y - 11y - 3
21. 24y
22. 2x + 4x – 3
14
2
8
6
– 4x + 4x – 16
x3 z 2
3y 6
4
2
19. a + 10 a + 25
2
23. 3x + x – 4
2
26. 64a + 48a + 9
28.
H:\CLASSES\Math90 Combo\Practice Tests\Ch5.docx
Scott Eckert
2
15. 2x – 5x – 8x + 6
17. 6x – 19xy + 10y
25. x
2
6. –y – 4y + 11
3
14. 35x y + 15x y – 20x y
2
55
x 3
1
w2
4.
9. 1.12 * 10
13. 37
24. 5x – 17 +
27.
9 8
2.
Page 1
10/24/2013
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