Ffactor
\left(13c-11\right)\left(13c+11\right)
Enrhifo
169c^{2}-121
Rhannu
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\left(13c-11\right)\left(13c+11\right)
Ailysgrifennwch 169c^{2}-121 fel \left(13c\right)^{2}-11^{2}. Gellir ffactorio’r gwahaniaeth rhwng sgwariau gan ddefnyddio’r rheol: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).
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