Unformatted text preview: 12/4 IM2
Name: 8.3 Solving Equations Using Special Factors
Period: No.
1. Solve Using Special Factors
Solve:
x2 - 18x + 81 = 0
(x + 9)(x+9) = 0
x+9=0
x = -9 2. 4x2 + 28x + 49 = 0 (2x - 7)(2x- 5) = 0
2x - 7 = 0
2x = 7
x = 7/2 3. 16x2 - 121 = 0
(4x - 11)(4x + 11) = 0
4x - 11 = 0 or 4x + 11 = 0 4. 4x = 11 or 4x = -11 x = 11/4 or x = -11/4 x2 - 25 = 0
(x - 5)(x - 5) = 0
x - 5 = 0 or x + 5 = 0
x = 5 or x = -5 ...
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