Chapter 5 Answers

Example Problems Answers

Factor:

1. x² - 8x + 12                2. x² - 36
    (x-6)(x-2)                        (x+6)(x-6)

3. Solve by graphing: y = 2x² +4

4. Solve by factoring:  6x² + 7x = 3.

6x² + 7x - 3= 0
(3x-1)(2x + 3)
3x - 1 = 0  and 2x + 3 = 0
x = ⅓  and x = - 1½

5. Solve using quadratic equation: 4x² - 8x + 12 = 0

6. Graph the inequality: y < x² -x - 6

Simplify the radical:

7. √(50)        √25 · √2 = 5√2