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October 25, 2014

October 25, 2014

Posted by **kim jung hee** on Monday, September 2, 2013 at 3:24am.

- maths -
**Graham**, Monday, September 2, 2013 at 3:46amIf 2x²+4x+1 = 0

Then: x = (-2±√2)/2

let α = (-2+√2)/2

let β = (-2-√2)/2

log_2(α) + log_2(β)

= log_2(αβ)

= log_2((-2+√2)(-2-√2)/4)

= log_2(1/2)

= -1

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