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using square roots how do I solve 3x squared +12=0

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1 Answer

1. 3x2+12=0
2. 3x2=-12 --> isolate the variable x
3. x2=4 --> divide out the 3
4. x=2 & x=-2 -->take the square root of x2 and 4, remember both 2and -22 equal 4.
Hope this helps.


You are awesome...the way you explain rather then just work out the problem was what I needed to help my son! Thank you.
The third step is wrong: it should be x2=-4
thus the subsequent results are wrong.