Directions: Solve the following Quadratic Equations by Factoring, Completing the Square and Using Quadratic Formula.
1. x² + 6x +9=0
2. x² +9x+ 20 = 0
3. 2x² - 10x+8=0
1. x² + 6x +9=0
2. x² +9x+ 20 = 0
3. 2x² - 10x+8=0
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Answer:
1. x² + 6x + 9 = 0
(x + 3)(x + 3) = 0
x = -3
2. x² + 9x + 20 = 0
(x + 5)(x + 4) = 0
x = -5, x = -4
3. 2x² - 10x + 8 = 0
2 (x - 4)(x - 1) = 0
x = 4, x = 1