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Which sum or difference is modeled by the algebra tiles?
C.
-X²
D.
**²
OA. (x²+2x+3) - (x² − 2x − 1) = -2x² +2
OB. (x²+2x+3) − (-x² + 2x + 1) = -2x² + 2
(-x² + 2x + 3) + (-x² + 2x + 1) = -2x² + 2
(-x² + 2x + 3) + (-x² - 2x - 1) = -2x² + 2
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Which sum or difference is modeled by the algebra tiles C X D OA x2x3 x 2x 1 2x 2 OB x2x3 x 2x 1 2x 2 x 2x 3 x 2x 1 2x 2 x 2x 3 x 2x 1 2x 2 1 1 class=

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