Enrhifo
25n^{2}-5n+\frac{4}{25}
Ehangu
25n^{2}-5n+\frac{4}{25}
Rhannu
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25n^{2}+5n\left(-\frac{1}{5}\right)-\frac{4}{5}\times 5n-\frac{4}{5}\left(-\frac{1}{5}\right)
Cyfrifwch y briodoledd ddosrannol drwy luosi pob 5n-\frac{4}{5} gan bob 5n-\frac{1}{5}.
25n^{2}-n-\frac{4}{5}\times 5n-\frac{4}{5}\left(-\frac{1}{5}\right)
Canslo 5 a 5.
25n^{2}-n-4n-\frac{4}{5}\left(-\frac{1}{5}\right)
Canslo 5 a 5.
25n^{2}-5n-\frac{4}{5}\left(-\frac{1}{5}\right)
Cyfuno -n a -4n i gael -5n.
25n^{2}-5n+\frac{-4\left(-1\right)}{5\times 5}
Lluoswch -\frac{4}{5} â -\frac{1}{5} drwy luosi'r rhifiadur â’r rhifiadur a'r enwadur â’r enwadur.
25n^{2}-5n+\frac{4}{25}
Gwnewch y gwaith lluosi yn y ffracsiwn \frac{-4\left(-1\right)}{5\times 5}.
25n^{2}+5n\left(-\frac{1}{5}\right)-\frac{4}{5}\times 5n-\frac{4}{5}\left(-\frac{1}{5}\right)
Cyfrifwch y briodoledd ddosrannol drwy luosi pob 5n-\frac{4}{5} gan bob 5n-\frac{1}{5}.
25n^{2}-n-\frac{4}{5}\times 5n-\frac{4}{5}\left(-\frac{1}{5}\right)
Canslo 5 a 5.
25n^{2}-n-4n-\frac{4}{5}\left(-\frac{1}{5}\right)
Canslo 5 a 5.
25n^{2}-5n-\frac{4}{5}\left(-\frac{1}{5}\right)
Cyfuno -n a -4n i gael -5n.
25n^{2}-5n+\frac{-4\left(-1\right)}{5\times 5}
Lluoswch -\frac{4}{5} â -\frac{1}{5} drwy luosi'r rhifiadur â’r rhifiadur a'r enwadur â’r enwadur.
25n^{2}-5n+\frac{4}{25}
Gwnewch y gwaith lluosi yn y ffracsiwn \frac{-4\left(-1\right)}{5\times 5}.
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