Thursday

August 21, 2014

August 21, 2014

Posted by **Josh** on Monday, November 21, 2011 at 3:45pm.

1. x^3+27=0

2. x^3-8=0

- Pre Calculus -
**Damon**, Monday, November 21, 2011 at 5:37pm27+0 i = 27 e^i(0) = 27 cos 0 + i sin 0

27^(1/3)=3e^0 or 3e^i(2pi/3) or 3e^(4 pi/3)

= 3

or

= 3 cos 120 + 2i sin 120

= -1.5 + i sqrt 3

or

= -1.5 - i sqrt 3

**Related Questions**

Pre Calculus - find all exact real solutions of the equation. x^4-2x^2-24=0

pre calculus please help - Find all solutions of the equation tan^5 x - 9tan x...

Pre-Calculus - cos^2(x) + sin(x) = 1 - Find all solutions in the interval [0, ...

Pre calculus - Please help me! Find the exact solutions to the quadratic ...

Pre calculus - use a calculator to find approximate solutions of the equation. 7...

Pre Calculus - use a calculator to find approximate solutions of the equation. 8...

Grade 12 Calculus - solve cosx= (squareroot3)/ 2 where 0 <(with a line ...

calculus - hi im back.. solve cosx= (squareroot3)/ 2 where 0 <(with a line ...

Pre-cal - find all solutions of equation in [0, 2pi) 2 (sec x)^2 + (tan x)^2 -3...

Pre- Calculus - In this problem we are supposed to find all real solutions. It ...