a2+4ab+4b2-c2 =

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2 + 0 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

a2+4ab+4b2-c2 =

(a-2b-c)(a-2b-c)

(a-2b+c)(a-2b-c)

(a+2b-c)(a+2b+c)

(a+2b-c)(a-2b+c)