SOLUTION: I tried every way imaginable to solve this problem but have had no luck. Please help! Factor completely. 9x^2 + 12xy + 4y^2 - 25 The 25 is what is throwing me off. There

Question 101666: I tried every way imaginable to solve this problem but have had no luck. Please help! Factor completely.
9x^2 + 12xy + 4y^2 - 25

The 25 is what is throwing me off. There are no like terms from the 25 to go with the other parts of the expression. Please explain! Thanks!
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
this is the difference of two squares

9x^2+12xy+4y^2 is (3x+2y)^2 ... 25 is 5^2

((3x+2y)+5)((3x+2y)-5) ... (3x+2y+5)(3x+2y-5)
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