SOLUTION: I have working on this math problem and I got an answer, but I don't know if I am right or not. I was wondering if someone could check my work and answer to see if I am wrong or no

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Question 140162This question is from textbook Algebra Structure and Method
: I have working on this math problem and I got an answer, but I don't know if I am right or not. I was wondering if someone could check my work and answer to see if I am wrong or not?? I would deeply appreciate it!! Please and Thank you!!
Factor by Grouping
Factor
a^4+b^4-c^4+2a^2b^2
(a^4-2a^2b^2+b^4)-c^4
(a^2-b^2)^2-(c^2)^2
(a^2-b^2-c^2)(a^2-b^2+c^2) as my answer This question is from textbook Algebra Structure and Method

Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
your solution:
a^4+b^4-c^4+2a^2b^2
(a^4-2a^2b^2+b^4)-c^4
(a^2-b^2)^2-(c^2)^2
(a^2-b^2-c^2)(a^2-b^2+c^2) as my answer
my solution
a^4+b^4-c^4+2a^2b^2
(a^4+2a^2b^2+b^4)-c^4 (is +2a^2b^2)
then
(a^2+b^2)^2-(c^2)^2
(a^2+b^2-c^2)(a^2+b^2+c^2)