SOLUTION: I need help solving this type of problem, it says to factor: 9x^2-25. the answer I got was(5+3x)(-5+3x)I need to know if that is right and if not please show me the steps so that I

Question 115534: I need help solving this type of problem, it says to factor: 9x^2-25. the answer I got was(5+3x)(-5+3x)I need to know if that is right and if not please show me the steps so that I can understand how to do these type problems.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
factor: 9x^2-25. the answer I got was(5+3x)(-5+3x)
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One of the factorable forms is "the difference of squares";
The form and factors look like this: a^2-b^2= (a-b)(a+b)
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Your Problem:
9x^2-25 can be written as:
(3x)^2 - (5^2)
The factors are (3x-5)(3x+5)
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Your answer is correct; just written backwards.
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Cheers,
Stan H.
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