Ffactor
\frac{\left(4u-9b\right)\left(4u+9b\right)}{144}
Enrhifo
\frac{u^{2}}{9}-\frac{9b^{2}}{16}
Rhannu
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\frac{16u^{2}-81b^{2}}{144}
Ffactora allan \frac{1}{144}.
\left(4u-9b\right)\left(4u+9b\right)
Ystyriwch 16u^{2}-81b^{2}. Ailysgrifennwch 16u^{2}-81b^{2} fel \left(4u\right)^{2}-\left(9b\right)^{2}. Gellir ffactorio’r gwahaniaeth rhwng sgwariau gan ddefnyddio’r rheol: p^{2}-q^{2}=\left(p-q\right)\left(p+q\right).
\frac{\left(4u-9b\right)\left(4u+9b\right)}{144}
Ailysgrifennwch y mynegiad cyfan wedi'i ffactorio.
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