 # Negative Exponents Practice Questions

1. Write 7 × 7 × 7 × 7 × 7 using exponents.

2. Write a × a × a ×b × b × b× b × b using exponents.

3. Write 22m3without using exponents.

4. Simplify and write without negative exponents: 5. Simplify and write without negative exponents : 6. Simplify and write without negative exponents: 7. Simplify and write without negative exponents: 8. Simplify each and write without negative exponents: 9. Simplify and write without negative exponents: 10. Simplify and write without negative exponents: 11. Simplify and write without negative exponents: 12. Simplify and write without negative exponents: 13. Simplify and write without negative exponents: 14. Simplify and write without negative exponents: 15. Write each number in scientific notation.

(a) 52,000
(b) 0.000000076
(c) 0.00000067
(d) 250,000

16. (a) Multiply using scientific notation and exponent rules and write your answer in
scientific notation. 17. (a) Divide using scientific notation and exponent rules and write your answer in
scientific notation. divided by (2 ×105 )

18. Astronomers measure large distances in light-years. One light year is the distance
that light can travel in one year and is 5,880,000,000,000 miles. A star is determined to
be 8.5 light years form Earth. Express the distance to the star in miles using scientific
notation.

19. In 1996 the national debt was \$5,200,000,000,000 and the population of the U.S. was
about 260,000,000 people. To the nearest dollar, what was each person’s share of the
debt?

20. Tell if each is a monomial , binomial, trinomial or not a polynomial. 21. Put each polynomial in descending order and state the degree. 22. ADD : 23. SUBTRACT : 24. ADD: 25. SUBTRACT: from 26. MULTIPLY: 27. MULTIPLY: 28. MULTIPLY: (3x − 5)(7x + 4)

29. MULTIPLY: 30. MULTIPLY: 31. MULTIPLY: (5z + 2)(5z − 2)

32. MULTIPLY: 33. MULTIPLY: (2x − 5y)(2x + 5y)

34. MULTIPLY: 35. DIVIDE: 36. DIVIDE using long division: 37. DIVIDE 38. DIVIDE using long division: 39. Show that by checking the division. (Don’t just re-do the
division.)

40. DIVIDE using long division: 41. Find the GCF ( greatest common factor) of 4 and 6.

42. Find the GCF of 28, 104, and 76.

43. Find the GCF of the terms 44. Find the GCF of the terms 45. Factor the greatest common factor: 46. Factor the greatest common factor: 47. Factor the GCF: 48. Factor by grouping: 49. Factor by grouping: ac + ad + bc + db

50. Factor completely: 51. Factor completely: 52. Factor completely: y 2– 7 y – 18

53. Factor completely: y2 + 5y – 10

54. Factor completely: 4x2 + 16x – 20

55. Factor the difference of two squares : 56. Factor the difference of two squares : 57. Factor the difference of two squares: 58. Factor completely: 3x2 – 12x – 15

59. Factor completely: x2+ 25

60. Factor the perfect square trinomial: y2+12y + 36

61. Factor the perfect square trinomial: z2− 4z + 4

62. Write this quadratic equation in standard form. 2x = 5 – 3x2

63. Write this quadratic equation in standard form. 5x – 2x2= 4

64. Is the equation −3x2+ 3x + 2 = −4 a quadratic equation? Why or why not?

65. Is the equation 3x + 2 = −4 +12x a quadratic equation ? Why or why not?

66. What do you know about c and d if c × d = 0 ?

67. Solve for x : x(x + 3) = 0

68. Solve for x: (x − 2)(x + 5) = 0

69. Solve for x by factoring: 64x = x2

70. Solve for x by factoring: x2– 7x –18 = 0

71. Solve for x by factoring: x2– 5x – 24 = 0

72. Solve for x by factoring: x2– 9x + 20 = 0

ANSWERS for Unit #4 Practice Questions 20.
(a) trinomial (b) not a poly
(c) monomial (d) not a poly
(e) monomial (f) binomial
(g) not a poly (h) monomial    53. can’t be factored 59. Can’t be factored 64. Yes, because it has an x2 term

65. No, it is linear

66. Either c = 0 or d = 0

67. x = 0 or x = –3

68. x = 2 or x = – 5

69. x= 0 or x = 64

70. x = 9 or x = –2

71. x = 8 or x = – 3

72. x = 4 or x = 5

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