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GED Math Review: factoring: Finding the GCF

__Questions:__

**A. Factor each expression so that one factor is the GCF of the expression.**

- 5x + 30
- 6y + 15
- 8x - 2
- 4z - 14
- b² + 9b
- y² + 3y
- 2x² + 4x
- 3x² + 9x
- 7y² - y
- 4x² + 2x
- ab + 2b
- 7xy + 14y
- 4z² - z
- 5z³ - 2z²
- 3x²y + 9x

**B. For each question, choose the answer in which one of the factors is the GCF of the expression.**
- Which of the following are the factors of 8abc - 2bc?
- bc(8a - 2)
- 2bc(4a - 1)
- 4ab(2c - b)
- 8a(bc - 2)

- What are the factors of 3z³ - 9z²?
- 3z² and z - 3
- 3z and z² - 3
- z² and 3z - 9
- z and 3z² - 9z

Answers:

- 5(x + 6)
- 3(2y + 5)
- 2(4x - 1)
- 2(2z - 7)
- b(b + 9)
- y(y + y)
- 2x(x + 2)
- 3x(x + 3)
- y(7y - 1)
- 2x(2x + 1)
- b(a + 2)
- 7y(x + 2)
- z(4z - 2)
- z²(5z - 2)
- 3x(xy + 3)
- 2bc(4a - 1)
- 3z² and z - 3

Reference:

Complete Test Preparation for the GED Test 2014 by Steck-Vaughn