Èô - 5aµÄn´Î·½ - bµÄn - 1´Î·½Óë1/3 - aµÄm+1´Î·½bµÄ2´Î·½ÊÇ...

ͬÀàÏî:Ëùº¬×ÖĸÏàͬ,²¢ÇÒÏàͬ×ÖĸµÄÖ¸ÊýÒ²·Ö±ðÏàͬµÄÏî½Ð×öͬÀàÏî.¡à n=m+1 n-1=2½âµÃ:n=3 m=2¡à (-n)µÄm´Î·½Îª9


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factor the trinomaial 16m²n - 18n² - 2mn...

=2n(8m^2-9-m)=2n(8m-9)(m+1)


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