Practice 13.5

Factor: 4x² - 9

• 3(x + 3)(x - 3)
• (2x + 3)(2x - 3)
• 2(x - 3)(x + 3)
• (2x - 3)(2x - 3)

Factor: x² + 20x + 100

• (x + 10)²
• (x - 10)²
• (x + 10)(x - 10)
• (x + 10)(x + 2)

Factor: 7m² + 6m - 1

• 7(m + 1)(m - 1)
• (m - 1)(7m + 1)
• (7m - 1)(m + 1)
• (7m + 1)(7m - 1)

Factor: 4v² - 16v - 48

• (4v + 8)(4v - 24)
• 4(v + 2)(v - 6)
• (4v + 2)(v + 6)
• 4(v - 2)(v + 6)

Factor: 9x³y + 9x²y - 40xy

• xy(3x - 5)(3x + 8)
• (3x²y - 5xy)(3x²y + 8xy)
• 3xy(x - 5)(x + 8)
• xy(3x + 5)(3x - 8)

Factor: 16x² - 25

• (4x - 5)(4x - 5)
• 4(x + 5)(x - 5)
• (4x + 5)(4x - 5)
• Not possible

Factor: x² - 18x + 81

• (x - 18)(x + 2)
• (x + 9)(x - 9)
• (x + 9)²
• (x - 9)²

Factor: 3k² - 10k + 7

• (k + 1)(3k - 7)
• (k - 1)(3k - 7)
• (k + 1)(3k + 7)
• 3(k - 1)(3k - 7)

Factor: 2x² - 16x - 18

• (2x + 1)(x - 9)
• 2(x - 1)(x + 9)
• 2(x + 1)(x - 9)
• (2x - 1)(x + 9)

Factor: 8a² + 28a + 12

• 4(a + 3)(2a + 1)
• 4(a - 3)(2a - 1)
• (4a + 3)(2a + 1)
• (a + 3)(8a + 1)