Select the correct answer. Which sum or difference is modeled by the algebra tiles?

A.
(-x2 + 2x + 3) − (x2 − 2x − 1) = -2x2 + 2
B.
(-x2 + 2x + 3) − (-x2 + 2x + 1) = -2x2 + 2
C.
(-x2 + 2x + 3) + (-x2 + 2x + 1) = -2x2 + 2
D.
(-x2 + 2x + 3) + (-x2 − 2x − 1) = -2x2 + 2

PLATO

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