This problewm is way easy but i forgot this step

G

Guest

Guest
ok this is what i know
6x^2-54
you can't factor these things out so what do i ??
thank you
 
Common factors area a good place to start.

54/6 = 9 -- Hey! 9 is a perfect square.
 
For any factoring problem, you always try to first factor out a common factor in all the terms. For this problem:

--------
ok this is what i know
6x^2-54
you can't factor these things out so what do i ??
thank you
---------

there is a factor of 6 common to each term so:

6(x^2 - 9)

In the parentheses you have the difference between two squares, which factors:

6(x + 3)(x - 3)

Hope that helps...

Steve
 
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