Which sum or difference is modeled by the algebra tiles? A. (x2 4x − 2) (x2 − 2x − 4) = 2x2 2x 2 B. (x2 4x − 2) (x2 2x 4) = 2x2 2x 2 C. (x2 4x − 2) − (-x2 2x − 4) = 2x2 2x 2 D. (x2 4x − 2) − (-x2 − 2x 4) = 2x2 2x 2.