Homework Help: Algebra

Posted by Sarah on Sunday, July 29, 2007 at 9:54pm.

Factor:

3x^2 - 27

3x^2-27=0
27+(3x^2-27)=0+27
3x^2=27
(3x^2)/3=27/3
x^2=9
x=3

Since there is 3x^2, one term must contain 3x and the other x. 27 factors into 3*3*3 or 3*9. With this information, you should be able to factor it yourself.

I hope this helps. Thanks for asking.

Algebra - Anonymous, Monday, April 15, 2013 at 2:27pm
X/4+x/5=27

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