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\left(4a^{2}+1\right)\left(a^{2}+1\right)
Kimihia he tauwehe o te āhua ka^{m}+n, e wehea ai e ka^{m} te huatahi me te pū nui rawa 4a^{4}, e wehea hoki e n te tauwehe pūmau 1. Ko tētahi tauwehe pērā ko 4a^{2}+1. Whakatauwehea te pūrau mā te whakawehe ki tēnei tauwehe. Kāore i tauwehea ēnei pūrau i te mea kāhore ō rātou pūtake whakahau: a^{2}+1,4a^{2}+1.