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September 23, 2014

September 23, 2014

Posted by **Bethany** on Monday, March 17, 2008 at 10:21pm.

Square root Property

2k^2 +144=0

2k^2 +144-144=0-144

2k^2=-144

This is where I am confused

2k=sqrt -144 (?)

- Algebra -
**Reiny**, Monday, March 17, 2008 at 10:26pm2k^2 = -144

k^2 = -72

Unless you have studied complex numbers you would stop here and say

"there is no real solution" since you cannot take the square root of a negative.

If you studied complex numbers you should know that i = √-1

so x = √-72

x = ±6√2 i

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