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Complete the square: a^2 - 2a - 8=0
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Complete the square: a^2 - 2a - 8=0

User ChrisPatrick
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a² - 2a - 8 = 0
(a - 4) (a + 2) = 0
a - 4 = 0 or a + 2 = 0
a = 4 or a = -2
User Rootkonda
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