SOLUTION: factor completely: 9m^2-9 choices: 1) (3m-3)+(3m+3) 2) (3m+3)^2 3) (3m+3)(3m-3) 4) (3m-3)^6 ??what is the difference between option 1 and option 3?

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: factor completely: 9m^2-9 choices: 1) (3m-3)+(3m+3) 2) (3m+3)^2 3) (3m+3)(3m-3) 4) (3m-3)^6 ??what is the difference between option 1 and option 3?      Log On


   

Question 153471: factor completely:
9m^2-9
choices:
1) (3m-3)+(3m+3)
2) (3m+3)^2
3) (3m+3)(3m-3)
4) (3m-3)^6
??what is the difference between option 1 and option 3?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
factor completely:
9m^2-9
choices:
1) (3m-3)+(3m+3)
2) (3m+3)^2
3) (3m+3)(3m-3)
4) (3m-3)^6
??what is the difference between option 1 and option 3?
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Since these are your choices, 1 and 3 are both correct
and there is no difference.
----------------
A better way to factor your problem is:
= 9(m^2-1)
=9(m-1)(m+1)
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Cheers,
Stan H.