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April 20, 2014

April 20, 2014

Posted by **Hina** on Monday, October 24, 2011 at 8:04pm.

- Math -
**Reiny**, Monday, October 24, 2011 at 8:54pmx^3 + 2x^2 - 96 = 0

tried x = 1,2,3,4 and x=4 worked

by synthetic division

x^3 + 2x^2 - 96 = 0

(x-4)(x^2 + 6x + 24) = 0

solving x^2 + 6x**+ 9**= -24 +**9**

(x+3)^2 = -15

x = +3 ± √15 i

x = 4 , 3 ± √15 i

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