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Q: Solve this quadratic equation using the qudratic formula. x^2 + 8x - 5 = 0
A: x^2 + 8x - 5 = 0 b^2 - 4ac = 8^2 - 4(1)(-5) = 84 x = [-b ± sqrt(b^2 - 4ac)]/2a x = (-8 ± sqrt 84)/2 = (-8 ± 2 sqrt 21)/2 = -4 ± sqrt 21
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User: Solve this quadratic equation using the qudratic formula. x^2 + 8x - 5 = 0

Question
Asked 2/2/2012 10:00:51 AM
Updated 4/28/2014 8:00:55 AM
1 Answer/Comment
Flagged by yeswey [4/28/2014 7:56:43 AM]
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x^2 + 8x - 5 = 0
b^2 - 4ac = 8^2 - 4(1)(-5) = 84
x = [-b ± sqrt(b^2 - 4ac)]/2a
x = (-8 ± sqrt 84)/2 = (-8 ± 2 sqrt 21)/2 = -4 ± sqrt 21
Added 4/28/2014 8:00:55 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [4/28/2014 1:45:12 PM]
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