Ffactor
13\left(x+y-1\right)\left(x+y+1\right)
Enrhifo
13\left(\left(x+y\right)^{2}-1\right)
Rhannu
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13\left(x^{2}+2xy+y^{2}-1\right)
Ffactora allan 13.
\left(x+y-1\right)\left(x+y+1\right)
Ystyriwch x^{2}+2xy+y^{2}-1. Ailysgrifennwch x^{2}+2xy+y^{2}-1 fel \left(x+y\right)^{2}-1^{2}. Gellir ffactorio’r gwahaniaeth rhwng sgwariau gan ddefnyddio’r rheol: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).
13\left(x+y-1\right)\left(x+y+1\right)
Ailysgrifennwch y mynegiad cyfan wedi'i ffactorio.
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