Question 83851
IN A WORD --- NO!!!!
4R^2-6RS-9S^2
2R-3S
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8R^2-12R^2S-18RS^2-12R^2S+18RS^2+27R^3 NOW COMBINE LIKE TERMS:
8R^3-24R^2S+27R63 [THE -18RS^2+18RS^2 CANCEL EACH OTHER]