Alg 2 Final Review - Units 4-5

Factor x² + 11x + 18

• (x + 11)(x + 7)

• (x + 2)(x + 9)

• (x + 6)(x + 3)

• (x + 10)(x + 8)

Factor: x² - 10x + 21

• (x + 3)(x + 7)

• (x - 7)( x + 3)

• (x - 3)(x + 7)

• (x - 7)(x - 3)

Factor: x² + 7x - 18

• (x + 3)(x + 6)

• (x + 9)(x - 2)

• (x + 6)(x - 3)

• (x + 2)(x - 9)

Factor
3a² + 4a + 1

• (7a-10)(a-8)
• Not factorable
• (3a+1)(a+1)
• (3a-1)(a-1)

Factor: 5n² - 6n - 27

• (5n + 3)(n-9)
• (5n - 3)(n + 9)
• (5n + 9)(n - 3)
• (5n - 9)(n + 3)

Solve by factoring: x² - 9x + 20 = 0

• x = -4 and x = -5
• x = 20 and x = -9
• x = 4 and x = 5
• x = -4 and x = 5

Solve by factoring: 2x² - 5x - 12 = 0

• x = -4 and x = -6
• x = 4 and x = -3/2
• x = 4 and x = 6
• x = -4 and x = 3/2

Solve using the quadratic formula.
2x² - 9x - 35 = 0

• x = 7/2, x = -6
• x = -5/2, x =5
• x = -3/7, x =6
• x = -5/2, x = 7

Solve Using the Quadratic Formula 
2x² + 7x - 15 = 0

• -1.5 or 5
• No Solution
• -5 or 1.5
• 0.7 or 5

If the discriminant is positive, then the solution will be

• one real solution

• two real solutions

• no real solutions

• one imaginary solution