SOLUTION: Factor completely: 9x^2 + 12xy + 4x^2 -25 My solution to this problem was (3x+2y)-25 I am not too confident that this is correct. If this is not correct could you assist me w

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Factor completely: 9x^2 + 12xy + 4x^2 -25 My solution to this problem was (3x+2y)-25 I am not too confident that this is correct. If this is not correct could you assist me w      Log On


   

Question 70673This question is from textbook Beginning Algebra
: Factor completely: 9x^2 + 12xy + 4x^2 -25
My solution to this problem was (3x+2y)-25
I am not too confident that this is correct. If this is not correct could you assist me with this problem please. Thanks. This question is from textbook Beginning Algebra

Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
9x^2+12xy+4y^2-25 You started on the right path factoring the x & y terms but
didn't include the -25.
Assume (3x+2y)=z then you have z^2-25=(z-5)(z+5) Thus we have:
(3x+2y)^2-25
(3x+2y)^2-5^2
(3x+2y-5)(3x+2y+5)